WO2019020762A1 - Device for transmitting sound for earphone comprising a main channel and an auxiliary channel - Google Patents

Device for transmitting sound for earphone comprising a main channel and an auxiliary channel Download PDF

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Publication number
WO2019020762A1
WO2019020762A1 PCT/EP2018/070336 EP2018070336W WO2019020762A1 WO 2019020762 A1 WO2019020762 A1 WO 2019020762A1 EP 2018070336 W EP2018070336 W EP 2018070336W WO 2019020762 A1 WO2019020762 A1 WO 2019020762A1
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WO
WIPO (PCT)
Prior art keywords
sound
diffusion
channel
chamber
auxiliary
Prior art date
Application number
PCT/EP2018/070336
Other languages
French (fr)
Inventor
Dominique Delamour
Original Assignee
CHÊNE, M. Richard
Miklitarian, Alain
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CHÊNE, M. Richard, Miklitarian, Alain filed Critical CHÊNE, M. Richard
Publication of WO2019020762A1 publication Critical patent/WO2019020762A1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2807—Enclosures comprising vibrating or resonating arrangements
    • H04R1/2853—Enclosures comprising vibrating or resonating arrangements using an acoustic labyrinth or a transmission line
    • H04R1/2857—Enclosures comprising vibrating or resonating arrangements using an acoustic labyrinth or a transmission line for loudspeaker transducers
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/18—Methods or devices for transmitting, conducting or directing sound
    • G10K11/22—Methods or devices for transmitting, conducting or directing sound for conducting sound through hollow pipes, e.g. speaking tubes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1016—Earpieces of the intra-aural type
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1058—Manufacture or assembly
    • H04R1/1075—Mountings of transducers in earphones or headphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
    • H04R1/345—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means for loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2205/00—Details of stereophonic arrangements covered by H04R5/00 but not provided for in any of its subgroups
    • H04R2205/024—Positioning of loudspeaker enclosures for spatial sound reproduction

Definitions

  • the present invention relates to the field of sound transmission devices, in particular, music.
  • headphones adapted to be worn on the head, comprising two headphones connected by a bow which are intended to cover the ears of the wearer of the helmet. These headphones are commonly referred to as closed earphones.
  • headphones without connecting hoop that are intended to be positioned directly in an ear. These headphones are commonly referred to as in-ear earphones.
  • the sound performance of such headphones is not optimal.
  • the sound performance can be determined according to several parameters, in particular, the quality of the highs, the quality of the mediums, the quality of the basses and the spatiality of the sounds emitted.
  • spatiality corresponds to the ability of the sound to be interpreted by the listener's brain as coming from various sources and from different locations. For example, when a listener is able to restore spatiality, the listener hears a sound from various sources and positioned more or less distant from him. In particular, woodwind instruments may seem closer to him than copper instruments, which improves the immersion of the listener.
  • patent application FR3020737A1 proposes a sound transmission device 4 for an earphone, comprising an input opening 41 extending along an input axis, said opening input 41 being adapted to receive a source of sound emission such as a speaker, an outlet opening 42 adapted to be presented in an ear 1 and a diffusion chamber 40 able to conduct the upstream sound downstream from said inlet opening 41 to said outlet opening 42, said diffusion enclosure 40 having, opposite said inlet opening 41, a first vibration wall extending orthogonal to the inlet axis able to resonate further to a sound emission along said input axis.
  • Such a transmission device generates vibrations of the sounds emitted by the sound source, which increases the spatiality.
  • One of the objectives of the present invention is to propose spatiality characteristics that offer a seemingly natural listening by reinforcing the impression of immersion of the users.
  • the invention relates to a sound transmission device for an earpiece, comprising an inlet opening extending along an input axis, said inlet opening being adapted to receive a source of sound emission, a output aperture adapted to be presented in an ear and a diffusion chamber adapted to conduct the upstream sound downstream from said inlet opening to said outlet opening.
  • the diffusion chamber comprises at least one longitudinal separation wall defining a main diffusion channel and at least one auxiliary diffusion channel of different lengths in the diffusion chamber so as to create an offset in the sound transmission at the exit aperture.
  • the separation wall allows, in the manner of an ear with a horn and conch forming natural channels, a weak time shift of the sound wave when it circulated in said separate channels.
  • the channels Preferably, the channels have different sections so as to modify the compression / decompression of sound differently depending on the channel in which it flows.
  • the processing of sound in a broadcast channel thus generates a time shift and a compression which are a function of the structure of said channel.
  • the difference in length, shape and section between the diffusion channels makes it possible to increase the spatiality in a natural way by the shifting of sound waves that is interpreted by the ear as spatiality.
  • the slight offsets of the sound do not allow to modify the sound but allow to modify its interpretation by the ear and the brain.
  • This interpretation of sound by the brain is used in the present invention.
  • the listening is remarkably pleasant and perfectly natural. Such immersion is all the more pleasant as it is performed mechanically.
  • the invention goes against current inventions that aim to increase the number and complexity of electronic components in headphones.
  • the longitudinal partition wall is located in an upstream portion of the diffusion enclosure.
  • the sound is processed independently from its input into the transmission device before being mixed to be transmitted to the user via the output aperture.
  • the sound is split because of the possibility of circulation that is offered by the invention.
  • the upstream portion has a decreasing cross section from upstream to downstream.
  • the sounds can be advantageously compressed during transmission, which improves the dynamics and intensity of said sounds.
  • the sound wave flows in a channel of narrowed cross-section, which improves the accuracy of the perceived sound, similar to the vision of an eye observing a landscape through a small orifice.
  • the main broadcast channel is shorter than the auxiliary broadcast channel.
  • the auxiliary diffusion channel may extend outwardly of the main diffusion channel relative to the atrial orifice.
  • the auxiliary broadcast channel is removable from the main broadcast channel.
  • the transmission device is thus scalable and configurable.
  • the collection advantageously includes auxiliary broadcast channels of different lengths and sections in order to treat the sound differently.
  • the auxiliary diffusion channel cooperates mechanically with the main diffusion channel, in particular by fit-fit fitting.
  • the average cross section of the main broadcast channel is larger than that of the auxiliary broadcast channel.
  • the compression of sounds is different, which amplifies the phenomenon of spatiality.
  • the auxiliary diffusion channel has a decreasing cross section from upstream to downstream.
  • the longitudinal partition wall has a length of between 40 mm and 75 mm. Such a separation length makes it possible to increase spatiality without disturbing the interpretation of sounds by the brain.
  • said diffusion enclosure comprises, opposite said inlet opening, a first vibration wall extending orthogonally to the input axis adapted to resonate following a sound emission along said input axis.
  • the main diffusion channel comprises at least one core in contact with the first vibration wall for the tender.
  • the soul makes it possible to increase the tension of the first wall of vibration so that it vibrates in the manner of a drum skin. In addition, this increases the power of the sounds and thus avoids using an oversized sound source.
  • the diffusion chamber comprising a second vibration wall parallel to the first vibration wall
  • said core is mounted between the first vibration wall and the second vibration wall to mechanically transmit the vibrations between said vibration walls.
  • said vibrations of the two walls of vibration are synchronized, which can contribute to increase the spatiality of the sound.
  • said upper core extends substantially parallel to said input axis.
  • said upper soul has a limited space in the diffusion chamber, which limits the risk of attenuation of the power of sounds.
  • said diffusion chamber extending longitudinally, the diffusion chamber comprises at least one sounding part mounted in a lateral edge of said diffusion chamber and projecting into the cavity of said chamber of diffusion.
  • the harmony piece allows, like a violin bar of a violin, to synthesize the sounds in order to balance the different sounds coming from the vibrations so as to form a coherent whole.
  • the harmony piece at least partially fulfills a damming function in the flow of sound so as to color the color, in particular by improving as appropriate the visibility of treble, midrange, bass.
  • the device comprises a lower chamber, in the sense of the position on the ear, which is blind.
  • a blind chamber makes it possible to lengthen the flow path of the sounds between the entrance opening and the exit opening, which improves the spatiality as well as the dynamics by creating another temporal offset.
  • the lower chamber opens onto the outlet opening and thus forms another sound diffusion channel.
  • the lower blind chamber makes it possible to act synergistically with the different diffusion channels by increasing the transmission delays of the sounds in the manner of an ear.
  • the lower chamber allows, synergistically with the broadcast channels, to temporally shift the sounds by allowing a rearward movement, especially for low frequency sounds.
  • said lower blind chamber extends in the extension of the diffusion chamber.
  • the communication between the lower chamber and the diffusion chamber is direct.
  • the lower chamber and the diffusion chamber extend opposite to the inlet opening.
  • the first vibration wall forms part of the diffusion chamber and the lower chamber.
  • the second vibration wall forms part of the diffusion chamber and the lower chamber.
  • the invention also relates to an earpiece comprising a sound transmission device as presented above and a sound emission source mounted in the input opening of said sound transmission device.
  • the invention further relates to a pair of earphones whose transmission devices are of different lengths.
  • the length of the transmission devices is adjustable in order to adapt to the morphology of each user, which provides additional comfort both for listening and for ergonomics when the transmission device is directly suspended at a distance.
  • ear of a user The invention also relates to a pair of intraauricular earphones that a headset having two earphones connected by a bow.
  • Figure 1 is a schematic representation of a sound transmission device according to the prior art in the use position
  • Figure 2 is a schematic representation of a sound transmission device according to the invention, the type of ear, in the position of use;
  • Figure 3 is a schematic sectional representation of the transmission device of Figure 2; and Figure 4 is a schematic representation of the correspondence of the structure of a transmission device according to the invention and the structure of a human ear. It should be noted that the figures disclose the invention in detail to implement the invention, said figures can of course be used to better define the invention where appropriate.
  • FIG. 2 there is shown diagrammatically an in-ear earphone 2 according to the invention.
  • the in-ear earphone 2 comprises a sound transmission device 4 in which a sound emission source 3 is mounted as shown in FIG. 3.
  • the sound emission source 3 is presented under form of a speaker, of diameter between 12 and 15 mm, connected to an audio player, a telephone or the like in a wired manner.
  • a wireless link in particular Bluetooth, could be suitable.
  • the sound transmission device 4 comprises an inlet opening 41, extending along an input axis X, which is able to receive the sound emission source 3, in particular a speaker. Also, preferably, the inlet opening 41 has an annular shape so as to cooperate by complementarity of shapes with a ring-shaped speaker.
  • the sound transmission device 4 further comprises an outlet opening 42 adapted to be inserted into the conch at the entrance of the auditory canal of the ear. For this purpose, the outlet opening 42 has a diameter of the order of 3 to 5 mm.
  • the sound transmission device 4 comprises a diffusion chamber 40 able to conduct the upstream sound downstream from said inlet opening 41 to said outlet opening 42.
  • the sound transmission device 4 has a blind lower chamber 8 which extends from the inlet opening 41.
  • blind room 8 we mean a room with no opening except for the entrance opening 41.
  • the lower blind chamber 8 makes it possible to reflect the sounds coming from the inlet opening 41 before returning them towards the exit opening 42.
  • the sound transmission device comprises only a single inlet opening 41 and a single outlet opening 42 in order to avoid any decrease in the sound power between the inlet opening 41 and the outlet opening 42.
  • the inlet opening 41 comprises a damper (glue, elastomer seal, etc.) for damping the vibrations generated by the sound emission source 3.
  • the sound transmission device 4 is curved so as to allow its ergonomic suspension on an ear 1. It goes without saying that the shape of the transmission device would be different for use in a helmet. As will be presented later, the diffusion chamber 40 allows a direct transmission of sound from the inlet opening 41 to the outlet opening 42 and a mechanical sound treatment by vibration.
  • the diffusion enclosure 40 successively comprises an upstream portion 40A, an intermediate portion 40B and a downstream portion 40C for conducting the sound between the inlet opening 41 and the outlet opening 42.
  • the parts 40A-40C are connected together by interlocking but it goes without saying that some parts could form a one-piece assembly, in particular, the upstream 40A and 40B intermediate parts so that the part downstream 40C remains orientable by the listener to facilitate the introduction of the earpiece 2 on his ear.
  • the upstream portion 40A advantageously makes it possible to generate a resonance in the diffusion chamber 40 in order to mechanically shift the sound frequencies to create a spatiality of the sound.
  • a portion of the upstream portion 40A extends in a plane orthogonal to the input axis X at the inlet opening 41.
  • the upstream portion 40A comprises a first vibration wall
  • the upstream portion 40A comprises a second vibration wall 52 which is substantially parallel to the first vibration wall 51.
  • the inlet opening 41 is formed in the second vibration wall 52 so that the sound waves coming from the sound emission source come into contact with the first vibration wall 51 for then being guided upstream downstream between the vibration walls 51, 52.
  • the vibration walls 51, 52 are connected laterally by an inner side wall 53 and an outer side wall 54. The vibration walls 51,
  • the upstream portion 40A could also not vibrate and form a resonator.
  • the upstream portion 40A of the diffusion chamber 40 has a decreasing cross section from upstream to downstream so as to allow compression of the sound.
  • the upstream portion 40A is curved at its downstream end so as to allow its ergonomic cooperation with an ear.
  • the upstream portion 40A is formed of a rigid material of the PVC type in order to allow an optimal vibration of the vibration walls 51, 52 but it goes without saying that other materials could also be suitable.
  • the upstream portion 40A has a length of between 3 and 5 cm and an upstream width of between 10 and 15 mm and a downstream width of between 3 and 5 mm.
  • the upstream width is adapted to the width of the sound emission source, that is to say, the loudspeaker. It goes without saying that other dimensions may also be appropriate.
  • the thickness of the upstream portion 40A is of the order of 1 -3 mm so that a source of sound emission can vibrate the first wall vibration optimally.
  • the upstream portion 40A of the diffusion enclosure 40 comprises a longitudinal separation wall 9 defining a main diffusion channel 6 and an auxiliary diffusion channel 7 of different lengths in the diffusion chamber 40 which has to increase the spatiality of the sound broadcast.
  • the average cross section of the main broadcast channel 6 is larger than that of the auxiliary broadcast channel 7.
  • the main broadcast channel 6 forms the shortest path between the input opening 41 and the opening 42.
  • the main broadcast channel 6 is shorter than the auxiliary broadcast channel 7.
  • the auxiliary broadcast channel 7 forms a bypass channel for shifting the sound waves with respect to the main broadcast channel 6 in order to to increase the psychoacoustic impression of spatiality.
  • the difference in the temporal arrival at the ear of these waves is a few milliseconds because of the very small difference in length of the diffusion channels 6, 7.
  • the delay of the sound waves of the sound is much less than 30 milliseconds beyond from which the ear perceives two different sounds (echo phenomenon).
  • the longitudinal separation wall 9 has a length of between 40 mm and 75 mm and extends directly from the inlet opening 41.
  • the thickness of the partition wall 9 is of the order of 1 mm.
  • a first end 7A of the auxiliary diffusion channel 7 opens directly into the inlet opening 41 while a second end 7B opens directly into the main diffusion channel 6 so as to allow a meeting of the sound which has known pathways. different traffic prior to its exit via the exit opening 42.
  • the auxiliary broadcast channel 7 is removable from the main broadcast channel 6.
  • auxiliary broadcast channels 6 of different properties that can be connected according to the needs and desires of the user to the main broadcast channel.
  • the transmission device 4 is thus evolutionary and configurable.
  • the collection advantageously comprises auxiliary diffusion channels 7 of different lengths and sections.
  • the auxiliary diffusion channel 7 cooperates mechanically with the main diffusion channel 6, in particular by fit-fit fitting.
  • the intermediate portion 40B advantageously guides the compressed sound between the upstream portion 40A and the downstream portion 40C.
  • the intermediate portion 40B of the diffusion enclosure 40 has a substantially constant cross section from upstream to downstream and is curved.
  • the downstream portion 40C advantageously guides the compressed sound of the intermediate portion 40B to the outlet 42.
  • the downstream portion 40C is bent so as to facilitate its presentation in the shell of the ear 1 after passing around the ear pavilion.
  • the downstream portion 40C of the diffusion chamber 40 has a substantially constant cross section from upstream to downstream.
  • downstream end of the downstream portion 40C may be provided with a tip to enhance the interaction between the sound transmitting device 4 and the listener's ear.
  • the sound transmission device 4 comprises, in this example, a blind lower chamber 8 which extends in the extension of the upstream portion 40A of the diffusion chamber 40 as illustrated in FIG. and 3.
  • the lower blind chamber 8 is diametrically opposed to the diffusion chamber 40 with respect to the inlet opening axis 41 as illustrated in FIG. 2.
  • the diffusion chamber 40 and the lower blind chamber 8 are made of the same material, in particular PVC.
  • the lower blind chamber 8 is preferably hollow, that is to say, provided with a cavity. Also, the lower blind chamber 8 makes it possible to receive the sound in its cavity before returning it to the diffusion enclosure 40 to the outlet opening 42. The sound guidance in the lower blind chamber 8 makes it possible to increase spacing frequencies of the sound (acute, midrange serious) and thus reinforce the spafialifé sound perceived by the user. Such a lower chamber 8 is thus particularly advantageous.
  • Such a blind chamber 8 is known from the patent application FR3020737A1 and will not be presented in more detail.
  • the sound transmission device 4 comprises an upper core 1 1 housed in the main diffusion channel of the upstream portion 40A.
  • the upper core 1 1 is arranged to exert a mechanical tension between the vibration walls 51, 52 to improve their vibratory characteristics in the manner of a violin core.
  • the upper core 1 1 makes it possible to mechanically connect the first vibration wall 51 with the second vibration wall 52 so that any vibration of the first vibration wall 51 is communicated to the second vibration wall 52.
  • a lower core is provided in the lower blind chamber 8.
  • the structure and function of a core has been presented in the patent application FR3020737A1 and will not be presented in more detail.
  • the transmission device 4 comprises a sounding part mounted in a lateral edge of the upstream portion 40A of the diffusion enclosure 40 and extending into the cavity of the enclosure of diffusion 40.
  • a sounding part mounted in a lateral edge of the upstream portion 40A of the diffusion enclosure 40 and extending into the cavity of the enclosure of diffusion 40.
  • the invention further relates to a pair of earphones whose transmission devices 4 are of different lengths.
  • the length of the transmission devices 4 is adjustable to suit the morphology of each user, which provides additional comfort for both listening and ergonomics.
  • a human ear has a tympanum, an external auditory canal (EAC), and a clubhouse.
  • EAC external auditory canal
  • the philosophy of the present invention is to present the functions of the structure of an ear by means of the transmission device in order to produce a natural sound, interpreted as such by the ear and the brain, while the latter has been transmitted by a speaker.
  • the structure of the transmission device is inspired by the structure of the auricle which essentially comprises a lower conch E6 which substantially surrounds the external auditory canal, an upper conch E8 and a navicular fossa E7 as illustrated in Figure 4.
  • the role of the pavilion is to collect certain frequencies of the sound, which has a preponderant role for the stereophony and allows a spatial interpretation of the sound (localization of a sound in the space which surrounds us). For example, the spatiality of sound is used in animals to orient themselves.
  • the main diffusion channel 6, the auxiliary diffusion channel 7 and the rear chamber 8 respectively correspond to the lower conch E6, to the navicular fossa E7 and to the conch upper E8 of an ear E as illustrated in Figure 4.
  • the sound processing by the transmission device 4 is similar to that of an ear E and allows to offer a spatial spatiality in a mechanical way, listening being more natural and therefore more accessible.
  • a user equips each of his ears with a headphone 2 according to the invention as illustrated in FIG. 2.
  • the user activates his music player which emits sounds via his loudspeaker 3 into the entrance opening 41.
  • the sound is led directly to the output aperture 42 by the first main broadcast channel 6 and the auxiliary broadcast channel 7 to be processed before being routed to the output aperture 42.
  • the sound of the loudspeaker 3 vibrates the first vibration wall 51 which extends orthogonally to the input axis X facing the inlet opening 41. Thanks to the upper core 1 1, the second vibration walls 52 also vibrate in a synchronized manner, which increases the offset between the frequencies of the sounds from the speaker 3 and therefore the spatiality
  • the sound waves perceived by the user are shifted weakly relative to each other. This results in increased spatiality and a strong sense of immersion when listening, especially when a sound transmission device is used for each ear.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Headphones And Earphones (AREA)

Abstract

A device for transmitting sound (4) for earphone (2), comprising an entrance opening (41) extending along an entrance axis, said entrance opening (41) being able to receive a sound emission source, an exit opening (42) able to be presented in an ear (1) and a diffusion enclosure (40) able to conduct the sound to said exit opening (42), the diffusion enclosure (40) comprising at least one longitudinal separation wall (9) defining at least one main diffusion channel (6) and an auxiliary diffusion channel (7) of different lengths in the diffusion enclosure (40) so as to create a shift in the transmission of the sound at the exit opening (42).

Description

DISPOSITIF DE TRANSMISSION DU SON POUR ECOUTEUR COMPORTANT UN CANAL  SOUND TRANSMISSION DEVICE FOR A HEADER COMPRISING A CHANNEL
PRINCIPAL ET UN CANAL AUXILIAIRE MAIN AND AUXILIARY CHANNEL
DOMAINE TECHNIQUE GENERAL ET ART ANTERIEUR GENERAL TECHNICAL FIELD AND PRIOR ART
La présente invention concerne le domaine des dispositifs de transmission du son, en particulier, de musique. The present invention relates to the field of sound transmission devices, in particular, music.
On connaît dans l'art antérieur un casque audio, adapté pour être porté sur la tête, comportant deux écouteurs reliés par un arceau qui sont destinés à venir recouvrir les oreilles du porteur du casque. Ces écouteurs sont couramment désignés écouteurs fermés. De même, on connaît des écouteurs sans arceau de liaison qui sont destinés à être positionnés directement dans une oreille. Ces écouteurs sont couramment désignés écouteurs intra-auriculaires. In the prior art is known headphones, adapted to be worn on the head, comprising two headphones connected by a bow which are intended to cover the ears of the wearer of the helmet. These headphones are commonly referred to as closed earphones. Similarly, there are known headphones without connecting hoop that are intended to be positioned directly in an ear. These headphones are commonly referred to as in-ear earphones.
Les performances sonores de tels écouteurs ne sont pas optimales. Les performances sonores peuvent être déterminées en fonction de plusieurs paramètres, en particulier, la qualité des aiguës, la qualité des médiums, la qualité des basses et la spatialité des sons émis. Pour rappel, la spatialité correspond à la faculté du son à être interprété par le cerveau de l'auditeur comme provenant de sources variées et de localisations différentes. A titre d'exemple, lorsqu'un écouteur est apte à restituer de la spatialité, l'auditeur entend un son provenant de sources variées et positionnées plus ou moins éloignées de lui. En particulier, les instruments à bois peuvent lui sembler plus proches que les instruments à cuivre, ce qui améliore l'immersion de l'auditeur. The sound performance of such headphones is not optimal. The sound performance can be determined according to several parameters, in particular, the quality of the highs, the quality of the mediums, the quality of the basses and the spatiality of the sounds emitted. As a reminder, spatiality corresponds to the ability of the sound to be interpreted by the listener's brain as coming from various sources and from different locations. For example, when a listener is able to restore spatiality, the listener hears a sound from various sources and positioned more or less distant from him. In particular, woodwind instruments may seem closer to him than copper instruments, which improves the immersion of the listener.
En pratique, les écouteurs classiques ne présentent pas une spatialité suffisante étant donné que le haut-parleur de l'écouteur est très proche de l'oreille de l'auditeur. Certains écouteurs tentent de reproduire une spatialité stéréo de manière électronique mais celle-ci demeure imparfaite. Un tel positionnement rapproché peut en outre engendrer des troubles de l'audition. In practice, conventional headphones do not have sufficient spatiality since the speaker of the earphone is very close to the ear of the listener. Some headphones attempt to reproduce stereo spatiality electronically but it remains imperfect. Such close positioning can also cause hearing problems.
En référence à la figure 1 , afin de résoudre cet inconvénient, il a été proposé par la demande de brevet FR3020737A1 un dispositif de transmission du son 4 pour écouteur, comportant une ouverture d'entrée 41 s'étendant selon un axe d'entrée, ladite ouverture d'entrée 41 étant apte à recevoir une source d'émission sonore comme un haut-parleur, une ouverture de sortie 42 apte à être présentée dans une oreille 1 et une enceinte de diffusion 40 apte à conduire le son d'amont en aval depuis ladite ouverture d'entrée 41 vers ladite ouverture de sortie 42, ladite enceinte de diffusion 40 comportant, en regard de ladite ouverture d'entrée 41 , une première paroi de vibration s'étendant orthogonalement à l'axe d'entrée apte à résonner suite à une émission sonore selon ledit axe d'entrée. Un tel dispositif de transmission génère des vibrations des sons émis par la source sonore, ce qui augmente la spatialité. Un des objectifs de la présente invention est de proposer des caractéristiques de spatialité qui offrent une écoute semblant naturelle par renforcement de l'impression d'immersion des utilisateurs. With reference to FIG. 1, in order to solve this drawback, patent application FR3020737A1 proposes a sound transmission device 4 for an earphone, comprising an input opening 41 extending along an input axis, said opening input 41 being adapted to receive a source of sound emission such as a speaker, an outlet opening 42 adapted to be presented in an ear 1 and a diffusion chamber 40 able to conduct the upstream sound downstream from said inlet opening 41 to said outlet opening 42, said diffusion enclosure 40 having, opposite said inlet opening 41, a first vibration wall extending orthogonal to the inlet axis able to resonate further to a sound emission along said input axis. Such a transmission device generates vibrations of the sounds emitted by the sound source, which increases the spatiality. One of the objectives of the present invention is to propose spatiality characteristics that offer a seemingly natural listening by reinforcing the impression of immersion of the users.
PRESENTATION GENERALE DE L'INVENTION GENERAL PRESENTATION OF THE INVENTION
A cet effet, l'invention concerne un dispositif de transmission du son pour écouteur, comportant une ouverture d'entrée s'étendant selon un axe d'entrée, ladite ouverture d'entrée étant apte à recevoir une source d'émission sonore, une ouverture de sortie apte à être présentée dans une oreille et une enceinte de diffusion apte à conduire le son d'amont en aval depuis ladite ouverture d'entrée vers ladite ouverture de sortie. For this purpose, the invention relates to a sound transmission device for an earpiece, comprising an inlet opening extending along an input axis, said inlet opening being adapted to receive a source of sound emission, a output aperture adapted to be presented in an ear and a diffusion chamber adapted to conduct the upstream sound downstream from said inlet opening to said outlet opening.
Le dispositif est remarquable en ce que l'enceinte de diffusion comporte au moins une paroi de séparation longitudinale définissant un canal de diffusion principal et au moins un canal de diffusion auxiliaire de longueurs différentes dans l'enceinte de diffusion de manière à créer un décalage dans la transmission du son à l'ouverture de sortie. The device is remarkable in that the diffusion chamber comprises at least one longitudinal separation wall defining a main diffusion channel and at least one auxiliary diffusion channel of different lengths in the diffusion chamber so as to create an offset in the sound transmission at the exit aperture.
Grâce à la paroi de séparation, on définit ainsi plusieurs canaux de diffusion du son. Ainsi, le son peut parvenir à l'ouverture de sortie via des chemins différents. L'association de plusieurs canaux permet, à la manière d'une oreille comportant un pavillon et une conque formant des canaux naturels, un décalage temporel faible de l'onde sonore lorsqu'elle a circulé dans lesdits canaux distincts. De manière préférée, les canaux possèdent des sections différentes de manière à modifier la compression/décompression du son de manière différente en fonction du canal dans lequel il circule. Le traitement du son dans un canal de diffusion engendre ainsi un décalage temporel et une compression qui sont fonction de la structure dudit canal. Thanks to the separation wall, several channels of sound diffusion are thus defined. Thus, the sound can reach the output aperture via different paths. The combination of several channels allows, in the manner of an ear with a horn and conch forming natural channels, a weak time shift of the sound wave when it circulated in said separate channels. Preferably, the channels have different sections so as to modify the compression / decompression of sound differently depending on the channel in which it flows. The processing of sound in a broadcast channel thus generates a time shift and a compression which are a function of the structure of said channel.
La différence de longueur, de forme et de section entre les canaux de diffusion permet d'augmenter la spatialité de manière naturelle par le décalage des ondes sonores qui est interprété par l'oreille comme de la spatialité. Les faibles décalages du son ne permettent pas de modifier le son mais permettent de modifier son interprétation par l'oreille et le cerveau. Cette interprétation du son par le cerveau est mise à profit dans la présente invention. Lors des tests, l'écoute est remarquablement agréable et parfaitement naturelle. Une telle immersion est d'autant plus plaisante qu'elle est réalisée de manière mécanique. L'invention va à encontre des inventions actuelles qui visent à augmenter le nombre et la complexité des composants électroniques dans des écouteurs. The difference in length, shape and section between the diffusion channels makes it possible to increase the spatiality in a natural way by the shifting of sound waves that is interpreted by the ear as spatiality. The slight offsets of the sound do not allow to modify the sound but allow to modify its interpretation by the ear and the brain. This interpretation of sound by the brain is used in the present invention. During the tests, the listening is remarkably pleasant and perfectly natural. Such immersion is all the more pleasant as it is performed mechanically. The invention goes against current inventions that aim to increase the number and complexity of electronic components in headphones.
Par ailleurs, comme la source d'émission sonore est éloignée de l'ouverture de sortie, le risque de troubles de l'audition est éliminé. Moreover, as the sound source is away from the exit aperture, the risk of hearing impairment is eliminated.
De préférence, la paroi de séparation longitudinale est située dans une partie amont de l'enceinte de diffusion. Ainsi, le son est traité indépendamment dès son entrée dans le dispositif de transmission avant d'être mélangé pour être transmis à l'utilisateur via l'ouverture de sortie. Autrement dit, le son est fractionné du fait de la possibilité de circulation qui lui est offerte par l'invention. Preferably, the longitudinal partition wall is located in an upstream portion of the diffusion enclosure. Thus, the sound is processed independently from its input into the transmission device before being mixed to be transmitted to the user via the output aperture. In other words, the sound is split because of the possibility of circulation that is offered by the invention.
De manière préférée, la partie amont possède une section transversale décroissante d'amont en aval. Ainsi, les sons peuvent être avantageusement compressés lors de leur transmission, ce qui améliore la dynamique et l'intensité desdits sons. Ainsi, l'onde sonore circule dans un canal de section transversale rétrécie, ce qui améliore la précision du son perçue, de manière analogue à la vision d'un oeil observant un paysage à travers un orifice de petite dimension. De préférence, le canal de diffusion principal est plus court que le canal de diffusion auxiliaire. Ainsi, la distance que les sons ont à parcourir est différente. En position d'utilisation, le canal de diffusion auxiliaire peut s'étendre extérieurement au canal de diffusion principal par rapport à l'orifice auriculaire. Ces chemins de circulation sont différents sans augmenter l'encombrement du dispositif de transmission. Preferably, the upstream portion has a decreasing cross section from upstream to downstream. Thus, the sounds can be advantageously compressed during transmission, which improves the dynamics and intensity of said sounds. Thus, the sound wave flows in a channel of narrowed cross-section, which improves the accuracy of the perceived sound, similar to the vision of an eye observing a landscape through a small orifice. Preferably, the main broadcast channel is shorter than the auxiliary broadcast channel. Thus, the distance that sounds have to go is different. In the use position, the auxiliary diffusion channel may extend outwardly of the main diffusion channel relative to the atrial orifice. These traffic paths are different without increasing the size of the transmission device.
Selon un aspect, le canal de diffusion auxiliaire est amovible du canal de diffusion principal. De manière avantageuse, on peut disposer d'une pluralité de canaux de diffusion auxiliaires de propriétés différentes qui peuvent être connectés selon les besoins et envies de l'utilisateur au canal de diffusion principal. Le dispositif de transmission est ainsi évolutif et paramétrable. La collection comprend avantageusement des canaux de diffusion auxiliaires de longueurs et de sections différentes afin de traiter le son de manière différente. De préférence, le canal de diffusion auxiliaire coopère de manière mécanique avec le canal de diffusion principal, en particulier, par emboîtement par complémentarité de formes. In one aspect, the auxiliary broadcast channel is removable from the main broadcast channel. Advantageously, one can have a plurality of auxiliary broadcast channels of different properties that can be connected according to the needs and desires of the user to the main broadcast channel. The transmission device is thus scalable and configurable. The collection advantageously includes auxiliary broadcast channels of different lengths and sections in order to treat the sound differently. Preferably, the auxiliary diffusion channel cooperates mechanically with the main diffusion channel, in particular by fit-fit fitting.
De manière préférée, la section transversale moyenne du canal de diffusion principal est plus importante que celle du canal de diffusion auxiliaire. Ainsi, la compression des sons est différente, ce qui amplifie le phénomène de spatialité. De préférence, le canal de diffusion auxiliaire possède une section transversale décroissante d'amont en aval. Preferably, the average cross section of the main broadcast channel is larger than that of the auxiliary broadcast channel. Thus, the compression of sounds is different, which amplifies the phenomenon of spatiality. Preferably, the auxiliary diffusion channel has a decreasing cross section from upstream to downstream.
De préférence, la paroi de séparation longitudinale possède une longueur comprise entre 40 mm et 75 mm. Une telle longueur de séparation permet d'augmenter la spatialité sans perturber l'interprétation des sons par le cerveau. Preferably, the longitudinal partition wall has a length of between 40 mm and 75 mm. Such a separation length makes it possible to increase spatiality without disturbing the interpretation of sounds by the brain.
De manière préférée, ladite enceinte de diffusion comporte, en regard de ladite ouverture d'entrée, une première paroi de vibration s'étendant orthogonalement à l'axe d'entrée apte à résonner suite à une émission sonore selon ledit axe d'entrée. Preferably, said diffusion enclosure comprises, opposite said inlet opening, a first vibration wall extending orthogonally to the input axis adapted to resonate following a sound emission along said input axis.
De manière préférée, le canal de diffusion principal comporte au moins une âme en contact avec la première paroi de vibration pour la tendre. L'âme permet d'augmenter la tension de la première paroi de vibration de manière à ce qu'elle vibre à la manière d'une peau de tambour. En outre, cela permet d'augmenter la puissance des sons et permet ainsi d'éviter d'utiliser une source d'émission sonore surdimensionnée. Preferably, the main diffusion channel comprises at least one core in contact with the first vibration wall for the tender. The soul makes it possible to increase the tension of the first wall of vibration so that it vibrates in the manner of a drum skin. In addition, this increases the power of the sounds and thus avoids using an oversized sound source.
De préférence, l'enceinte de diffusion comportant une deuxième paroi de vibration parallèle à la première paroi de vibration, ladite âme est montée entre la première paroi de vibration et la deuxième paroi de vibration pour transmettre mécaniquement les vibrations entre lesdites parois de vibration. Ainsi, les vibrations des deux parois de vibration sont synchronisées, ce qui peut contribuer à augmenter la spatialité du son. De préférence, ladite âme supérieure s'étend sensiblement parallèlement audit axe d'entrée. Ainsi, ladite âme supérieure possède un encombrement limité dans l'enceinte de diffusion, ce qui limite le risque d'atténuation de la puissance des sons. Preferably, the diffusion chamber comprising a second vibration wall parallel to the first vibration wall, said core is mounted between the first vibration wall and the second vibration wall to mechanically transmit the vibrations between said vibration walls. Thus, the vibrations of the two walls of vibration are synchronized, which can contribute to increase the spatiality of the sound. Preferably, said upper core extends substantially parallel to said input axis. Thus, said upper soul has a limited space in the diffusion chamber, which limits the risk of attenuation of the power of sounds.
Selon un aspect préféré, ladite enceinte de diffusion s'étendant longitudinalement, l'enceinte de diffusion comporte au moins une pièce d'harmonie montée dans un bord latéral de ladite enceinte de diffusion et s'étendant en saillie dans la cavité de la dite enceinte de diffusion. La pièce d'harmonie permet, à la manière d'une barre d'harmonie d'un violon, de synthétiser les sons afin d'équilibrer les différents sons issus des vibrations de manière à former un ensemble cohérent. De manière avantageuse, la pièce d'harmonie remplit au moins partiellement une fonction de barrage dans la circulation du son de manière à en teinter la couleur, notamment, en améliorant selon le cas la visibilité des aigus, des médiums, des graves. According to a preferred aspect, said diffusion chamber extending longitudinally, the diffusion chamber comprises at least one sounding part mounted in a lateral edge of said diffusion chamber and projecting into the cavity of said chamber of diffusion. The harmony piece allows, like a violin bar of a violin, to synthesize the sounds in order to balance the different sounds coming from the vibrations so as to form a coherent whole. Advantageously, the harmony piece at least partially fulfills a damming function in the flow of sound so as to color the color, in particular by improving as appropriate the visibility of treble, midrange, bass.
De manière préférée, le dispositif comporte une chambre inférieure, au sens de la position sur l'oreille, qui est borgne. Une telle chambre borgne permet d'allonger le chemin de circulation des sons entre l'ouverture d'entrée et l'ouverture de sortie, ce qui améliore la spatialité ainsi que la dynamique par la création d'un autre décalage temporel. La chambre inférieure débouche sur l'ouverture de sortie et forme ainsi un autre canal de diffusion du son. La chambre inférieure borgne permet d'agir de manière synergique avec les différents canaux de diffusion en augmentant les décalages de transmission des sons à la manière d'une oreille. La chambre inférieure permet, de manière synergique avec les canaux de diffusion, de décaler temporellement les sons en autorisant un déplacement vers l'arrière, en particulier, pour les sons basse fréquence. Selon un aspect, ladite chambre inférieure borgne s'étend dans le prolongement de l'enceinte de diffusion. Ainsi, la communication entre la chambre inférieure et l'enceinte de diffusion est directe. La chambre inférieure et l'enceinte de diffusion s'étendent de manière opposée par rapport à l'ouverture d'entrée. Preferably, the device comprises a lower chamber, in the sense of the position on the ear, which is blind. Such a blind chamber makes it possible to lengthen the flow path of the sounds between the entrance opening and the exit opening, which improves the spatiality as well as the dynamics by creating another temporal offset. The lower chamber opens onto the outlet opening and thus forms another sound diffusion channel. The lower blind chamber makes it possible to act synergistically with the different diffusion channels by increasing the transmission delays of the sounds in the manner of an ear. The lower chamber allows, synergistically with the broadcast channels, to temporally shift the sounds by allowing a rearward movement, especially for low frequency sounds. In one aspect, said lower blind chamber extends in the extension of the diffusion chamber. Thus, the communication between the lower chamber and the diffusion chamber is direct. The lower chamber and the diffusion chamber extend opposite to the inlet opening.
De préférence encore, la première paroi de vibration forme une partie de l'enceinte de diffusion et de la chambre inférieure. De préférence toujours, la deuxième paroi de vibration forme une partie de l'enceinte de diffusion et de la chambre inférieure. L'invention concerne également un écouteur comportant un dispositif de transmission du son tel que présenté précédemment et une source d'émission sonore montée dans l'ouverture d'entrée dudit dispositif de transmission du son. More preferably, the first vibration wall forms part of the diffusion chamber and the lower chamber. Preferably still, the second vibration wall forms part of the diffusion chamber and the lower chamber. The invention also relates to an earpiece comprising a sound transmission device as presented above and a sound emission source mounted in the input opening of said sound transmission device.
L'invention concerne en outre une paire d'écouteurs dont les dispositifs de transmission sont de longueurs différentes. De préférence, la longueur des dispositifs de transmission est réglable afin de s'adapter à la morphologie de chaque utilisateur, ce qui apporte un confort supplémentaire aussi bien pour l'écoute que pour l'ergonomie lorsque le dispositif de transmission est directement suspendu à une oreille d'un utilisateur. L'invention vise aussi bien une paire d'écouteurs intraauriculaires qu'un casque comportant deux écouteurs reliés par un arceau. The invention further relates to a pair of earphones whose transmission devices are of different lengths. Preferably, the length of the transmission devices is adjustable in order to adapt to the morphology of each user, which provides additional comfort both for listening and for ergonomics when the transmission device is directly suspended at a distance. ear of a user. The invention also relates to a pair of intraauricular earphones that a headset having two earphones connected by a bow.
PRESENTATION DES FIGURES L'invention sera mieux comprise à la lecture de la description qui va suivre, donnée uniquement à titre d'exemple, et se référant aux dessins annexés sur lesquels : PRESENTATION OF THE FIGURES The invention will be better understood on reading the description which will follow, given solely by way of example, and referring to the appended drawings in which:
la figure 1 est une représentation schématique d'un dispositif de transmission du son selon l'art antérieur en position d'utilisation ;  Figure 1 is a schematic representation of a sound transmission device according to the prior art in the use position;
la figure 2 est une représentation schématique d'un dispositif de transmission du son selon l'invention, du type tour d'oreille, en position d'utilisation ;  Figure 2 is a schematic representation of a sound transmission device according to the invention, the type of ear, in the position of use;
la figure 3 est une représentation schématique en coupe du dispositif de transmission de la figure 2 ; et la figure 4 est une représentation schématique de la correspondance de la structure d'un dispositif de transmission selon l'invention et de la structure d'une oreille humaine. II faut noter que les figures exposent l'invention de manière détaillée pour mettre en oeuvre l'invention, lesdites figures pouvant bien entendu servir à mieux définir l'invention le cas échéant. Figure 3 is a schematic sectional representation of the transmission device of Figure 2; and Figure 4 is a schematic representation of the correspondence of the structure of a transmission device according to the invention and the structure of a human ear. It should be noted that the figures disclose the invention in detail to implement the invention, said figures can of course be used to better define the invention where appropriate.
DESCRIPTION D'UN OU PLUSIEURS MODES DE REALISATION ET DE MISE EN OEUVRE DESCRIPTION OF ONE OR MORE MODES OF REALIZATION AND IMPLEMENTATION
En référence à la figure 2, il est représenté de manière schématique un écouteur intra- auriculaire 2 selon l'invention. With reference to FIG. 2, there is shown diagrammatically an in-ear earphone 2 according to the invention.
L'écouteur intra-auriculaire 2 comporte un dispositif de transmission du son 4 dans lequel est montée une source d'émission sonore 3 comme illustré à la figure 3. Dans cet exemple de réalisation, la source d'émission sonore 3 se présente sous la forme d'un haut-parleur, de diamètre compris entre 12 et 15 mm, relié à un baladeur audio, un téléphone ou analogue de manière filaire. Néanmoins, il va de soi qu'une liaison sans fil, en particulier Bluetooth, pourrait convenir. The in-ear earphone 2 comprises a sound transmission device 4 in which a sound emission source 3 is mounted as shown in FIG. 3. In this embodiment, the sound emission source 3 is presented under form of a speaker, of diameter between 12 and 15 mm, connected to an audio player, a telephone or the like in a wired manner. Nevertheless, it goes without saying that a wireless link, in particular Bluetooth, could be suitable.
Comme illustré aux figures 2 et 3, le dispositif de transmission du son 4 comporte une ouverture d'entrée 41 , s'étendant selon un axe d'entrée X, qui est apte à recevoir la source d'émission sonore 3, en particulier, un haut-parleur. Aussi, de manière préférée, l'ouverture d'entrée 41 possède une forme annulaire de manière à coopérer par complémentarité de formes avec un haut-parleur de forme annulaire. Le dispositif de transmission du son 4 comporte en outre une ouverture de sortie 42 apte à être insérée dans la conque à l'entrée du conduit auditif de l'oreille. A cet effet, l'ouverture de sortie 42 possède un diamètre de l'ordre de 3 à 5 mm. Le dispositif de transmission du son 4 comprend une enceinte de diffusion 40 apte à conduire le son d'amont en aval depuis ladite ouverture d'entrée 41 vers ladite ouverture de sortie 42. Dans cette forme de réalisation, le dispositif de transmission du son 4 comporte une chambre inférieure borgne 8 qui s'étend depuis l'ouverture d'entrée 41 . Par chambre borgne 8, on entend une chambre dénuée d'ouverture à l'exception de l'ouverture d'entrée 41 . Comme cela sera présenté par la suite, la chambre inférieure borgne 8 permet de réfléchir les sons issus de l'ouverture d'entrée 41 avant de les retourner vers l'ouverture de sortie 42. De manière préférée, le dispositif de transmission du son ne comporte qu 'une unique ouverture d'entrée 41 et qu 'une unique ouverture de sortie 42 afin d'éviter toute diminution de la puissance du son entre l'ouverture d'entrée 41 et l'ouverture de sortie 42. De préférence, l'ouverture d'entrée 41 comporte un amortisseur (colle, joint élastomère, etc.) pour amortir les vibrations générées par la source d'émission sonore 3. As illustrated in FIGS. 2 and 3, the sound transmission device 4 comprises an inlet opening 41, extending along an input axis X, which is able to receive the sound emission source 3, in particular a speaker. Also, preferably, the inlet opening 41 has an annular shape so as to cooperate by complementarity of shapes with a ring-shaped speaker. The sound transmission device 4 further comprises an outlet opening 42 adapted to be inserted into the conch at the entrance of the auditory canal of the ear. For this purpose, the outlet opening 42 has a diameter of the order of 3 to 5 mm. The sound transmission device 4 comprises a diffusion chamber 40 able to conduct the upstream sound downstream from said inlet opening 41 to said outlet opening 42. In this embodiment, the sound transmission device 4 has a blind lower chamber 8 which extends from the inlet opening 41. By blind room 8, we mean a room with no opening except for the entrance opening 41. As will be shown below, the lower blind chamber 8 makes it possible to reflect the sounds coming from the inlet opening 41 before returning them towards the exit opening 42. Preferably, the sound transmission device comprises only a single inlet opening 41 and a single outlet opening 42 in order to avoid any decrease in the sound power between the inlet opening 41 and the outlet opening 42. the inlet opening 41 comprises a damper (glue, elastomer seal, etc.) for damping the vibrations generated by the sound emission source 3.
Comme illustré aux figures 2 à 3, le dispositif de transmission du son 4 est incurvé de manière à permettre sa suspension ergonomique sur une oreille 1 . Il va de soi que la forme du dispositif de transmission serait différente pour une utilisation dans un casque. Comme cela sera présenté par la suite, l'enceinte de diffusion 40 permet une transmission directe du son de l'ouverture d'entrée 41 vers l'ouverture de sortie 42 et un traitement mécanique du son par vibrations. As illustrated in Figures 2 to 3, the sound transmission device 4 is curved so as to allow its ergonomic suspension on an ear 1. It goes without saying that the shape of the transmission device would be different for use in a helmet. As will be presented later, the diffusion chamber 40 allows a direct transmission of sound from the inlet opening 41 to the outlet opening 42 and a mechanical sound treatment by vibration.
Dans cette forme de réalisation, en référence à la figure 2, l'enceinte de diffusion 40 comporte successivement une partie amont 40A, une partie intermédiaire 40B et une partie aval 40C pour conduire le son entre l'ouverture d'entrée 41 et l'ouverture de sortie 42. Dans cet exemple, les parties 40A-40C sont connectées ensemble par emboîtement mais il va de soi que certaines parties pourraient former un ensemble monobloc, en particulier, les parties amont 40A et intermédiaire 40B de manière à ce que la partie aval 40C demeure orientable par l'auditeur afin de faciliter la mise en place de l'écouteur 2 sur son oreille. In this embodiment, with reference to FIG. 2, the diffusion enclosure 40 successively comprises an upstream portion 40A, an intermediate portion 40B and a downstream portion 40C for conducting the sound between the inlet opening 41 and the outlet opening 42. In this example, the parts 40A-40C are connected together by interlocking but it goes without saying that some parts could form a one-piece assembly, in particular, the upstream 40A and 40B intermediate parts so that the part downstream 40C remains orientable by the listener to facilitate the introduction of the earpiece 2 on his ear.
Les parties 40A-40C de l'enceinte de diffusion 40 vont être dorénavant présentées de manière indépendante. The portions 40A-40C of the diffusion enclosure 40 will now be presented independently.
La partie amont 40A permet avantageusement de générer une résonance dans l'enceinte de diffusion 40 afin de décaler de manière mécanique les fréquences sonores pour créer une spatialité du son. De manière préférée, une portion de la partie amont 40A s'étend dans un plan orthogonal à l'axe d'entrée X au niveau de l'ouverture d'entrée 41 . A cet effet, en référence à la figure 3, la partie amont 40A comprend une première paroi de vibrationThe upstream portion 40A advantageously makes it possible to generate a resonance in the diffusion chamber 40 in order to mechanically shift the sound frequencies to create a spatiality of the sound. Preferably, a portion of the upstream portion 40A extends in a plane orthogonal to the input axis X at the inlet opening 41. For this purpose, with reference to FIG. 3, the upstream portion 40A comprises a first vibration wall
51 en regard de l'ouverture d'entrée 41 et qui s'étend orthogonalement à l'axe d'entrée X. De même, la partie amont 40A comprend une deuxième paroi de vibration 52 qui est sensiblement parallèle à la première paroi de vibration 51 . Comme illustré à la figure 3, l'ouverture d'entrée 41 est formée dans la deuxième paroi de vibration 52 de manière à ce que les ondes sonores issues de la source d'émission sonore entrent en contact avec la première paroi de vibration 51 pour être ensuite guidées d'amont en aval entre les paroi de vibration 51 , 52. Les parois de vibration 51 , 52 sont reliées latéralement par une paroi latérale intérieure 53 et une paroi latérale extérieure 54. Les parois de vibration 51 ,51 opposite the inlet opening 41 and which extends orthogonally to the input axis X. Similarly, the upstream portion 40A comprises a second vibration wall 52 which is substantially parallel to the first vibration wall 51. As illustrated in FIG. 3, the inlet opening 41 is formed in the second vibration wall 52 so that the sound waves coming from the sound emission source come into contact with the first vibration wall 51 for then being guided upstream downstream between the vibration walls 51, 52. The vibration walls 51, 52 are connected laterally by an inner side wall 53 and an outer side wall 54. The vibration walls 51,
52 peuvent être incurvées tout en demeurant parallèles entre elles afin d'épouser la forme du crâne de l'auditeur sans altérer la qualité optimale de la vibration qui peut exister. Il va de soi que la partie amont 40A pourrait également ne pas vibrer et former un résonateur. 52 can be curved while remaining parallel to each other in order to fit the shape of the listener's skull without altering the optimal quality of the vibration that may exist. It goes without saying that the upstream portion 40A could also not vibrate and form a resonator.
En référence à la figure 2, la partie amont 40A de l'enceinte de diffusion 40 possède une section transversale décroissante de l'amont vers l'aval de manière à permettre une compression du son. De préférence, la partie amont 40A est incurvée à son extrémité aval de manière à permettre sa coopération ergonomique avec une oreille. Referring to Figure 2, the upstream portion 40A of the diffusion chamber 40 has a decreasing cross section from upstream to downstream so as to allow compression of the sound. Preferably, the upstream portion 40A is curved at its downstream end so as to allow its ergonomic cooperation with an ear.
De manière préférée, la partie amont 40A est formée en un matériau rigide du type PVC afin de permettre une vibration optimale des parois de vibration 51 , 52 mais il va de soi que d'autres matériaux pourraient également convenir. Preferably, the upstream portion 40A is formed of a rigid material of the PVC type in order to allow an optimal vibration of the vibration walls 51, 52 but it goes without saying that other materials could also be suitable.
De manière préférée, la partie amont 40A possède une longueur comprise entre 3 et 5 cm et une largeur amont comprise entre 10 et 15 mm et une largeur aval comprise entre 3 et 5 mm. De manière avantageuse, la largeur amont est adaptée à la largeur de la source d'émission sonore, c'est-à-dire, du haut-parleur. Il va de soi que d'autres dimensions pourraient également convenir. Preferably, the upstream portion 40A has a length of between 3 and 5 cm and an upstream width of between 10 and 15 mm and a downstream width of between 3 and 5 mm. Advantageously, the upstream width is adapted to the width of the sound emission source, that is to say, the loudspeaker. It goes without saying that other dimensions may also be appropriate.
De préférence encore, l'épaisseur de la partie amont 40A est de l'ordre de 1 -3 mm de manière à ce qu'une source d'émission sonore puisse faire vibrer la première paroi de vibration de manière optimale. Selon l'invention, la partie amont 40A de l'enceinte de diffusion 40 comporte une paroi de séparation longitudinale 9 définissant un canal de diffusion principal 6 et un canal de diffusion auxiliaire 7 de longueurs différentes dans l'enceinte de diffusion 40 ce qui a pour effet d'augmenter la spatialité du son diffusés. More preferably, the thickness of the upstream portion 40A is of the order of 1 -3 mm so that a source of sound emission can vibrate the first wall vibration optimally. According to the invention, the upstream portion 40A of the diffusion enclosure 40 comprises a longitudinal separation wall 9 defining a main diffusion channel 6 and an auxiliary diffusion channel 7 of different lengths in the diffusion chamber 40 which has to increase the spatiality of the sound broadcast.
Dans cet exemple, la section transversale moyenne du canal de diffusion principal 6 est plus importante que celle du canal de diffusion auxiliaire 7. Le canal de diffusion principal 6 forme le chemin le plus court entre l'ouverture d'entrée 41 et l'ouverture de sortie 42. Autrement dit, le canal de diffusion principal 6 est plus court que le canal de diffusion auxiliaire 7. Le canal de diffusion auxiliaire 7 forme un canal de dérivation permettant de décaler les ondes sonores par rapport au canal de diffusion principal 6 afin d'augmenter l'impression psycho-acoustique de spatialité. La différence d'arrivée temporelle à l'oreille de ces ondes est de quelques millisecondes du fait de la différence de longueur très faible des canaux de diffusion 6, 7. Le retard des ondes sonores du son est très inférieur aux 30 millisecondes au-delà desquelles l'oreille perçoit deux sons différents (phénomène de l'écho). In this example, the average cross section of the main broadcast channel 6 is larger than that of the auxiliary broadcast channel 7. The main broadcast channel 6 forms the shortest path between the input opening 41 and the opening 42. In other words, the main broadcast channel 6 is shorter than the auxiliary broadcast channel 7. The auxiliary broadcast channel 7 forms a bypass channel for shifting the sound waves with respect to the main broadcast channel 6 in order to to increase the psychoacoustic impression of spatiality. The difference in the temporal arrival at the ear of these waves is a few milliseconds because of the very small difference in length of the diffusion channels 6, 7. The delay of the sound waves of the sound is much less than 30 milliseconds beyond from which the ear perceives two different sounds (echo phenomenon).
En référence à la figure 2, la paroi de séparation longitudinale 9 possède une longueur comprise entre 40 mm et 75 mm et s'étend directement depuis l'ouverture d'entrée 41 . L'épaisseur de la paroi de séparation 9 est de l'ordre de 1 mm. With reference to FIG. 2, the longitudinal separation wall 9 has a length of between 40 mm and 75 mm and extends directly from the inlet opening 41. The thickness of the partition wall 9 is of the order of 1 mm.
Une première extrémité 7A du canal de diffusion auxiliaire 7 débouche directement dans l'ouverture d'entrée 41 tandis qu 'une deuxième extrémité 7B débouche directement dans le canal de diffusion principal 6 de manière à permettre une réunion du son qui a connu des voies de circulation différentes préalablement à sa sortie via l'ouverture de sortie 42. A first end 7A of the auxiliary diffusion channel 7 opens directly into the inlet opening 41 while a second end 7B opens directly into the main diffusion channel 6 so as to allow a meeting of the sound which has known pathways. different traffic prior to its exit via the exit opening 42.
Selon un aspect de l'invention, le canal de diffusion auxiliaire 7 est amovible du canal de diffusion principal 6. According to one aspect of the invention, the auxiliary broadcast channel 7 is removable from the main broadcast channel 6.
De manière avantageuse, on peut disposer d'une pluralité de canaux de diffusion auxiliaires 6 de propriétés différentes qui peuvent être connectés selon les besoins et envies de l'utilisateur au canal de diffusion principal. Le dispositif de transmission 4 est ainsi évolutif et paramétrable. La collection comprend avantageusement des canaux de diffusion auxiliaires 7 de longueurs et de sections différentes. Advantageously, one can have a plurality of auxiliary broadcast channels 6 of different properties that can be connected according to the needs and desires of the user to the main broadcast channel. The transmission device 4 is thus evolutionary and configurable. The collection advantageously comprises auxiliary diffusion channels 7 of different lengths and sections.
De préférence, le canal de diffusion auxiliaire 7 coopère de manière mécanique avec le canal de diffusion principal 6, en particulier, par emboîtement par complémentarité de formes. Preferably, the auxiliary diffusion channel 7 cooperates mechanically with the main diffusion channel 6, in particular by fit-fit fitting.
La partie intermédiaire 40B permet avantageusement de guider le son compressé entre la partie amont 40A et la partie aval 40C. En référence à la figure 2, la partie intermédiaire 40B de l'enceinte de diffusion 40 possède une section transversale sensiblement constante de l'amont vers l'aval et est incurvée. The intermediate portion 40B advantageously guides the compressed sound between the upstream portion 40A and the downstream portion 40C. With reference to FIG. 2, the intermediate portion 40B of the diffusion enclosure 40 has a substantially constant cross section from upstream to downstream and is curved.
La partie aval 40C permet avantageusement de guider le son compressé de la partie intermédiaire 40B vers la sortie 42. A cet effet, la partie aval 40C est coudée de manière à faciliter sa présentation dans la conque de l'oreille 1 après son passage autour du pavillon de l'oreille. En référence à la figure 2, la partie aval 40C de l'enceinte de diffusion 40 possède une section transversale sensiblement constante de l'amont vers l'aval. The downstream portion 40C advantageously guides the compressed sound of the intermediate portion 40B to the outlet 42. For this purpose, the downstream portion 40C is bent so as to facilitate its presentation in the shell of the ear 1 after passing around the ear pavilion. Referring to Figure 2, the downstream portion 40C of the diffusion chamber 40 has a substantially constant cross section from upstream to downstream.
De manière optionnelle, l'extrémité aval de la partie aval 40C peut être pourvue d'un embout afin d'améliorer l'interaction entre le dispositif de transmission du son 4 et l'oreille de l'auditeur. Optionally, the downstream end of the downstream portion 40C may be provided with a tip to enhance the interaction between the sound transmitting device 4 and the listener's ear.
Outre l'enceinte de diffusion 40, le dispositif de transmission du son 4 comporte, dans cet exemple, une chambre inférieure borgne 8 qui s'étend dans le prolongement de la partie amont 40A de l'enceinte de diffusion 40 comme illustré aux figures 2 et 3. Autrement dit, la chambre inférieure borgne 8 est diamétralement opposée à l'enceinte de diffusion 40 par rapport à l'axe d'ouverture d'entrée 41 comme illustré à la figure 2. De préférence, l'enceinte de diffusion 40 et la chambre inférieure borgne 8 sont réalisées dans un même matériau, en particulier, du PVC. In addition to the diffusion chamber 40, the sound transmission device 4 comprises, in this example, a blind lower chamber 8 which extends in the extension of the upstream portion 40A of the diffusion chamber 40 as illustrated in FIG. and 3. In other words, the lower blind chamber 8 is diametrically opposed to the diffusion chamber 40 with respect to the inlet opening axis 41 as illustrated in FIG. 2. Preferably, the diffusion chamber 40 and the lower blind chamber 8 are made of the same material, in particular PVC.
La chambre inférieure borgne 8 est de préférence creuse, c'est-à-dire, pourvue d'une cavité. Aussi, la chambre inférieure borgne 8 permet de recevoir le son dans sa cavité avant de le retourner dans l'enceinte de diffusion 40 jusqu'à l'ouverture de sortie 42. Le guidage du son dans la chambre inférieure borgne 8 permet d'augmenter l'écartement des fréquences du son (aiguë, médium ef grave) ef ainsi renforcer la spafialifé du son perçu par l'utilisateur. Une telle chambre inférieure 8 est ainsi particulièrement avantageuse. Une telle chambre borgne 8 est connue de la demande de brevet FR3020737A1 et ne sera pas présentée plus en détails. The lower blind chamber 8 is preferably hollow, that is to say, provided with a cavity. Also, the lower blind chamber 8 makes it possible to receive the sound in its cavity before returning it to the diffusion enclosure 40 to the outlet opening 42. The sound guidance in the lower blind chamber 8 makes it possible to increase spacing frequencies of the sound (acute, midrange serious) and thus reinforce the spafialifé sound perceived by the user. Such a lower chamber 8 is thus particularly advantageous. Such a blind chamber 8 is known from the patent application FR3020737A1 and will not be presented in more detail.
Selon un aspect de l'invention, le dispositif de transmission du son 4 comporte une âme supérieure 1 1 logée dans le canal de diffusion principal de la partie amont 40A. L'âme supérieure 1 1 est agencée pour exercer une tension mécanique entre les parois de vibration 51 , 52 afin d'améliorer leurs caractéristiques vibratoires à la manière d'une âme de violon. Autrement dit, l'âme supérieure 1 1 permet de relier mécaniquement la première paroi de vibration 51 avec la deuxième paroi de vibration 52 afin que toute vibration de la première paroi de vibration 51 soit communiquée à la deuxième paroi de vibration 52. Il peut également être prévu une âme inférieure dans la chambre inférieure borgne 8. La structure et la fonction d'une âme a été présentée dans la demande de brevet FR3020737A1 et ne sera pas présentée plus en détails. According to one aspect of the invention, the sound transmission device 4 comprises an upper core 1 1 housed in the main diffusion channel of the upstream portion 40A. The upper core 1 1 is arranged to exert a mechanical tension between the vibration walls 51, 52 to improve their vibratory characteristics in the manner of a violin core. In other words, the upper core 1 1 makes it possible to mechanically connect the first vibration wall 51 with the second vibration wall 52 so that any vibration of the first vibration wall 51 is communicated to the second vibration wall 52. a lower core is provided in the lower blind chamber 8. The structure and function of a core has been presented in the patent application FR3020737A1 and will not be presented in more detail.
Selon un aspect de l'invention non représenté, le dispositif de transmission 4 comporte une pièce d'harmonie montée dans un bord latéral de la partie amont 40A de l'enceinte de diffusion 40 et s'étendant dans la cavité de l'enceinte de diffusion 40. Une telle pièce d'harmonie est connue de la demande de brevet FR3020737A1 et ne sera pas présentée plus en détails. According to one aspect of the invention not shown, the transmission device 4 comprises a sounding part mounted in a lateral edge of the upstream portion 40A of the diffusion enclosure 40 and extending into the cavity of the enclosure of diffusion 40. Such a piece of harmony is known from the patent application FR3020737A1 and will not be presented in more detail.
L'invention concerne en outre une paire d'écouteurs dont les dispositifs de transmission 4 sont de longueurs différentes. De préférence, la longueur des dispositifs de transmission 4 est réglable afin de s'adapter à la morphologie de chaque utilisateur, ce qui apporte un confort supplémentaire aussi bien pour l'écoute que pour l'ergonomie. The invention further relates to a pair of earphones whose transmission devices 4 are of different lengths. Preferably, the length of the transmission devices 4 is adjustable to suit the morphology of each user, which provides additional comfort for both listening and ergonomics.
Avec un réglage adapté à chaque oreille de l'auditeur, l'écoute est plus confortable et naturelle. En particulier, on note un enrichissement des graves donnant plus de profondeur au son et une présence accrue dans les médiums offrant une meilleure intelligibilité à l'ensemble du rendu sonore. Le décalage temporel du son entre les deux oreilles augmente l'impression de spatialité. En référence à la figure 4, une oreille humaine comporte un tympan, un conduit auditif externe (CAE) et un pavillon. En analysant la structure d'une oreille, lors d'une écoute naturelle, il apparaît que le pavillon prépare une partie des sons préalablement à leur introduction dans le conduit auditif externe. La philosophie de la présente invention est de présenter les fonctions de la structure d'une oreille au moyen du dispositif de transmission afin de produire un son naturel, interprété comme tel par l'oreille et le cerveau, alors que celui-ci a été émis par un haut-parleur. With a setting adapted to each ear of the listener, listening is more comfortable and natural. In particular, we note an enrichment of the bass giving more depth to the sound and an increased presence in the mediums offering a better intelligibility to the whole of the sound reproduction. The temporal offset of the sound between the two ears increases the impression of spatiality. Referring to Figure 4, a human ear has a tympanum, an external auditory canal (EAC), and a clubhouse. By analyzing the structure of an ear, during a natural listening, it appears that the pavilion prepares some of the sounds prior to their introduction into the external auditory canal. The philosophy of the present invention is to present the functions of the structure of an ear by means of the transmission device in order to produce a natural sound, interpreted as such by the ear and the brain, while the latter has been transmitted by a speaker.
La structure du dispositif de transmission est inspirée de la structure du pavillon de l'oreille qui comporte essentiellement une conque inférieure E6 qui entoure sensiblement le conduit auditif externe, une conque supérieure E8 et une fossette naviculaire E7 comme illustré à la figure 4. The structure of the transmission device is inspired by the structure of the auricle which essentially comprises a lower conch E6 which substantially surrounds the external auditory canal, an upper conch E8 and a navicular fossa E7 as illustrated in Figure 4.
De manière connue, le rôle du pavillon est de collecter certaine fréquences du son, ce qui a un rôle prépondérant pour la stéréophonie et permet une interprétation spatiale du son (localisation d'un son dans l'espace qui nous entoure). La spatialité du son est par exemple utilisée chez les animaux pour s'orienter. In a known way, the role of the pavilion is to collect certain frequencies of the sound, which has a preponderant role for the stereophony and allows a spatial interpretation of the sound (localization of a sound in the space which surrounds us). For example, the spatiality of sound is used in animals to orient themselves.
Dans une application du dispositif de transmission du son 4 selon l'invention, le canal de diffusion principal 6, le canal de diffusion auxiliaire 7 et la chambre arrière 8 correspondent respectivement à la conque inférieure E6, à la fossette naviculaire E7 et à la conque supérieure E8 d'une oreille E comme illustré à la figure 4. Ainsi, le traitement du son par le dispositif de transmission 4 est analogue à celui d'une oreille E et permet d'offrir une spatialité approfondie de manière mécanique, l'écoute étant alors plus naturelle et donc plus accessible. In an application of the sound transmission device 4 according to the invention, the main diffusion channel 6, the auxiliary diffusion channel 7 and the rear chamber 8 respectively correspond to the lower conch E6, to the navicular fossa E7 and to the conch upper E8 of an ear E as illustrated in Figure 4. Thus, the sound processing by the transmission device 4 is similar to that of an ear E and allows to offer a spatial spatiality in a mechanical way, listening being more natural and therefore more accessible.
A titre d'exemple, un utilisateur équipe chacune de ses oreilles d'un écouteur 2 selon l'invention comme illustré à la figure 2. L'utilisateur active son lecteur de musique qui émet des sons via son haut-parleur 3 dans l'ouverture d'entrée 41 . Le son est conduit directement à l'ouverture de sortie 42 par le premier canal de diffusion principal 6 et le canal de diffusion auxiliaire 7 afin d'être traité avant d'être acheminé jusqu'à l'ouverture de sortie 42. De manière préférée, le son du hauf-parleur 3 fait vibrer la première paroi de vibration 51 qui s'étend orthogonalement à l'axe d'entrée X en regard de l'ouverture d'entrée 41 . Grâce à l'âme supérieure 1 1 , les deuxièmes parois de vibration 52 entrent également en vibration de manière synchronisée, ce qui augmente le décalage entre les fréquences des sons issus du haut-parleur 3 et donc la spatialité By way of example, a user equips each of his ears with a headphone 2 according to the invention as illustrated in FIG. 2. The user activates his music player which emits sounds via his loudspeaker 3 into the entrance opening 41. The sound is led directly to the output aperture 42 by the first main broadcast channel 6 and the auxiliary broadcast channel 7 to be processed before being routed to the output aperture 42. Preferably, the sound of the loudspeaker 3 vibrates the first vibration wall 51 which extends orthogonally to the input axis X facing the inlet opening 41. Thanks to the upper core 1 1, the second vibration walls 52 also vibrate in a synchronized manner, which increases the offset between the frequencies of the sounds from the speaker 3 and therefore the spatiality
Certains sons reviennent dans l'ouverture de sortie 42 après avoir circulés dans la chambre inférieure borgne 8. Autrement dit, le son émis depuis une même source peut circuler via quatre chemins différents avant d'atteindre l'ouverture de sortie 42. Some sounds return to the exit opening 42 after having circulated in the lower blind chamber 8. In other words, the sound emitted from the same source can flow via four different paths before reaching the exit opening 42.
Les ondes sonores perçues par l'utilisateur sont décalées faiblement les unes par rapport aux autres. Il en résulte une spatialité accrue et un fort sentiment d'immersion lors de l'écoute, en particulier, lorsqu'un dispositif de transmission du son est utilisé pour chaque oreille. The sound waves perceived by the user are shifted weakly relative to each other. This results in increased spatiality and a strong sense of immersion when listening, especially when a sound transmission device is used for each ear.

Claims

REVENDICATIONS
Dispositif de transmission du son (4) pour écouteur (2), comportant une ouverture d'entrée (41 ) s'étendant selon un axe d'entrée (X), ladite ouverture d'entrée (41 ) étant apte à recevoir une source d'émission sonore (3), une ouverture de sortie (42) apte à être présentée dans une oreille et une enceinte de diffusion (40) apte à conduire le son d'amont en aval depuis ladite ouverture d'entrée (41 ) vers ladite ouverture de sortie (42) , dispositif caractérisé par le fait que, l 'enceinte de diffusion (40) comportant successivement une partie amont (40A), une partie intermédiaire (40B) et une partie aval (40C) pour conduire le son entre l 'ouverture d'entrée (41 ) et l'ouverture de sortie (42), l'enceinte de diffusion (40) comporte au moins une paroi de séparation longitudinale (9), située uniquement dans la partie amont (40A) de l'enceinte de diffusion (40), définissant un canal de diffusion principal (6) et au moins un canal de diffusion auxiliaire (7) de longueurs différentes dans l'enceinte de diffusion (40) de manière à créer un décalage dans la transmission du son à l 'ouverture de sortie (42) . Sound transmission device (4) for earphone (2), having an inlet opening (41) extending along an input axis (X), said inlet opening (41) being adapted to receive a source sound emission device (3), an outlet opening (42) adapted to be presented in an ear and a diffusion chamber (40) capable of conducting the upstream sound downstream from said inlet opening (41) towards said outlet opening (42), characterized in that, the diffusion chamber (40) successively comprising an upstream portion (40A), an intermediate portion (40B) and a downstream portion (40C) for conducting the sound between the inlet opening (41) and the outlet opening (42), the diffusion chamber (40) has at least one longitudinal separation wall (9) situated only in the upstream part (40A) of the diffusion enclosure (40) defining a main diffusion channel (6) and at least one auxiliary diffusion channel (7) of length rs in the diffusion enclosure (40) to create an offset in sound transmission at the output aperture (42).
Dispositif selon la revendication 1 , dans lequel la partie amont (40A) possède une section transversale décroissante d 'amont en aval. Apparatus according to claim 1, wherein the upstream portion (40A) has a decreasing cross section from upstream to downstream.
Dispositif selon l'une des revendications 1 à 2, dans lequel la partie amont (40A) possède une forme incurvée apte à être montée sur une partie supérieure d'une oreille. Device according to one of claims 1 to 2, wherein the upstream portion (40A) has a curved shape adapted to be mounted on an upper part of an ear.
Dispositif selon l 'une des revendications 1 à 3, dans lequel le canal de diffusion principal (6) est plus court que le canal de diffusion auxiliaire (7) . Device according to one of claims 1 to 3, wherein the main diffusion channel (6) is shorter than the auxiliary diffusion channel (7).
Dispositif selon l 'une des revendications 1 à 4, dans lequel la section transversale moyenne du canal de diffusion principal (6) est plus importante que celle du canal de diffusion auxiliaire (7) . Device according to one of claims 1 to 4, wherein the average cross section of the main broadcast channel (6) is larger than that of the auxiliary broadcast channel (7).
Dispositif selon l'une des revendications 1 à 5, dans lequel la paroi de séparation longitudinale (9) possède une longueur comprise entre 40 mm et 75 mm. Device according to one of claims 1 to 5, wherein the longitudinal partition wall (9) has a length of between 40 mm and 75 mm.
7. Dispositif selon l'une des revendications 1 à 6, comportant une chambre inférieure borgne (8) . 7. Device according to one of claims 1 to 6, comprising a lower blind chamber (8).
8. Dispositif selon l'une des revendications 1 à 7, dans lequel le canal de diffusion auxiliaire (7) est amovible du canal de diffusion principal (6) . 8. Device according to one of claims 1 to 7, wherein the auxiliary diffusion channel (7) is removable from the main diffusion channel (6).
9. Ecouteur comportant un dispositif de transmission du son (4) selon l 'une des revendications précédentes et une source d'émission sonore (3) montée dans l'ouverture d 'entrée (41 ) dudit dispositif de transmission du son (4). 9. Earpiece comprising a sound transmission device (4) according to one of the preceding claims and a sound emission source (3) mounted in the input opening (41) of said sound transmission device (4). .
PCT/EP2018/070336 2017-07-28 2018-07-26 Device for transmitting sound for earphone comprising a main channel and an auxiliary channel WO2019020762A1 (en)

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FR1757200 2017-07-28
FR1757200A FR3069746B1 (en) 2017-07-28 2017-07-28 SOUND TRANSMISSION DEVICE FOR EARPHONE COMPRISING A MAIN CHANNEL AND AN AUXILIARY CHANNEL

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2558055A1 (en) * 1984-01-17 1985-07-19 Michas Frederic Filter for auditory prosthesis as well as prostheses provided with this filter
EP0421681A2 (en) * 1989-09-30 1991-04-10 Sony Corporation Electro-acoustic transducer and sound reproducing system
FR3020737A1 (en) 2014-05-05 2015-11-06 Chene Richard DEVICE FOR TRANSMITTING SOUNDS FOR INTRA-AURICULAR HEADER AND INTRA-AURICULAR HEADER
WO2017072237A1 (en) * 2015-10-30 2017-05-04 Chene, Richard Audio headset

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2558055A1 (en) * 1984-01-17 1985-07-19 Michas Frederic Filter for auditory prosthesis as well as prostheses provided with this filter
EP0421681A2 (en) * 1989-09-30 1991-04-10 Sony Corporation Electro-acoustic transducer and sound reproducing system
FR3020737A1 (en) 2014-05-05 2015-11-06 Chene Richard DEVICE FOR TRANSMITTING SOUNDS FOR INTRA-AURICULAR HEADER AND INTRA-AURICULAR HEADER
WO2017072237A1 (en) * 2015-10-30 2017-05-04 Chene, Richard Audio headset

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