CN114745631A - Sounder module and intelligent head-mounted equipment - Google Patents

Sounder module and intelligent head-mounted equipment Download PDF

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Publication number
CN114745631A
CN114745631A CN202210346250.5A CN202210346250A CN114745631A CN 114745631 A CN114745631 A CN 114745631A CN 202210346250 A CN202210346250 A CN 202210346250A CN 114745631 A CN114745631 A CN 114745631A
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China
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sounder
module
acoustic
standing wave
sound
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CN202210346250.5A
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Chinese (zh)
Inventor
刘广升
郭翔
张军
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Goertek Inc
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Goertek Inc
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Priority to CN202210346250.5A priority Critical patent/CN114745631A/en
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    • 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
    • H04R1/2869—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/017—Head mounted
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C11/00—Non-optical adjuncts; Attachment thereof
    • G02C11/10—Electronic devices other than hearing aids
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/16—Mounting or tensioning of diaphragms or cones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/025—Magnetic circuit
    • H04R9/027—Air gaps using a magnetic fluid
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/04—Construction, mounting, or centering of coil
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/017—Head mounted
    • G02B2027/0178—Eyeglass type

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • Multimedia (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)

Abstract

The invention discloses a sounder module, which comprises a module shell and a sounder monomer positioned in the module shell, wherein a vibrating diaphragm of the sounder monomer divides the space in the sounder module into a front sound cavity and a rear sound cavity; the distance from the center position of the sounder monomer to the side wall surface of the main sound outlet hole is not less than 8.5 mm; the acoustic component is provided with a communication hole on the opposite side wall surface of the main sound outlet hole, and is communicated with the front sound cavity through the communication hole. By using the sounder module as the sounder, the standing wave valley point influencing the flatness of the sensitivity curve is eliminated, and the medium-high frequency tone quality is improved.

Description

Sounder module and intelligent head-mounted equipment
Technical Field
The invention belongs to the technical field of electroacoustic transduction, and particularly relates to a sounder module and intelligent head-mounted equipment.
Background
In recent years, intelligent head-mounted devices such as VR and AR develop rapidly, and the sounder module is as its important sounder, and the structure also constantly improves to satisfy that intelligent head-mounted devices possesses the high-fidelity tone quality performance that can lifelike reappear various audio.
The sounder module is an energy conversion device, and is used for completing conversion between electric signals and sound signals. In the existing sounder module, especially for the module with side sound outlet, the sound outlet channel of the front sound cavity is generally longer. Taking intelligent glasses as an example, in order to save product space, the sounder module is usually arranged in the glasses legs, and the front sound cavity and the rear sound cavity formed by the glasses legs shell are provided with long and narrow sound outlet channels which can cause numerous standing wave resonance peaks and valleys, particularly influence the flatness of a frequency response curve in a middle-high frequency band, and reduce the middle-high frequency tone quality.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a sounder module and an intelligent headset, which can eliminate the valley point of the sensitivity curve and improve the medium-high frequency sound quality.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, an embodiment of the present invention provides a sounder module, including a module housing and a sounder monomer located in the module housing, where a diaphragm of the sounder monomer divides a space in the sounder module into a front sound cavity and a rear sound cavity, the sounder module is provided with a main sound outlet communicated with the front sound cavity, and the main sound outlet is located on a side surface of the front sound cavity and on one side of a short axis of the sounder monomer; the distance from the center position of the sounder monomer to the side wall surface of the main sound outlet hole is not less than 8.5 mm; the acoustic device is characterized in that an acoustic component for resonance sound absorption is arranged in the acoustic device module, a communicating hole is formed in the side wall surface of the main sound outlet hole, and the acoustic component is communicated with the front sound cavity through the communicating hole.
In one possible implementation, the resonant frequency of the acoustic component is located in a frequency band corresponding to a valley of a standing wave of the acoustic generator module.
In one possible implementation, the acoustic member is a plurality of acoustic members, and any one of the acoustic members is separately communicated with the front sound cavity through a respective communication hole.
In one possible implementation manner, the number of the acoustic components is three, and the resonant frequency of one acoustic component is the frequency corresponding to the lowest point of sensitivity of the standing wave valley.
In one possible implementation manner, at least part of the module shell is a whole machine shell of the intelligent head-mounted device.
In a possible implementation manner, the acoustic component is a folded pipe, and one end of the folded pipe is closed, and the other end of the folded pipe is used as a communication hole to be communicated with the front sound cavity.
Wherein, preferably, each of the folding pipes is formed by separating partitions arranged at equal intervals.
In a possible implementation, the number of the folding pipes is at least two, and the equivalent length between any two folding pipes is different.
Preferably, the number of the folded pipes is at least three, and the resonant frequencies of at least three of the folded pipes are distributed in an equal bandwidth.
In one possible implementation, the acoustic member is a helmholtz resonator, and an open end of the helmholtz resonator is communicated with the front sound chamber as a communication hole.
Preferably, the number of the helmholtz resonators is at least three, and the resonance frequencies of at least three helmholtz resonators are distributed in an equal bandwidth.
In a second aspect, an embodiment of the present invention provides an intelligent headset, which includes the sounder module described above.
In one possible implementation, the smart headset includes a complete machine housing that forms at least part of the structure of the module housing of the sounder module.
The invention has the advantages and beneficial effects that:
the sounder module provided by the embodiment of the invention is a side sound-emitting module, the main sound-emitting hole is arranged on the side surface of the front sound cavity and is positioned on one side of the short axis of the sounder monomer, and the distance from the central position of the sounder monomer of the module to the side wall surface of the main sound-emitting hole is not less than 8.5mm, so that the front sound cavity is provided with a long and narrow sound-emitting channel, and the long and narrow sound-emitting channel can cause an obvious standing wave resonance valley below 10 kHz. In order to reduce the standing wave valley caused by the standing wave interference, the acoustic component capable of resonant sound absorption is arranged in the acoustic generator module, the main sound outlet hole of the acoustic component is provided with the communicating hole on the side wall surface, and the acoustic component is communicated with the front sound cavity through the communicating hole, so that the resonance sound absorption characteristic of the acoustic component can be utilized, the reflection of the main sound outlet hole in the front sound cavity on the side wall surface is reduced, the standing wave interference between the reflected sound wave and the emitted sound wave is avoided, the generation of the standing wave is damaged, the standing wave valley point influencing the flatness of the sensitivity curve is eliminated, and the medium-high frequency sound quality is improved.
According to the intelligent head-mounted equipment provided by the embodiment of the invention, the sounder module is used as the sounder, so that the standing wave valley point influencing the flatness of the sensitivity curve can be eliminated, and the medium-high frequency tone quality is improved.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of a sounder module installed in an intelligent head-mounted device according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a sounder module configured with a foldable tube according to an embodiment of the present invention;
fig. 3 is a schematic cross-sectional view of a front acoustic cavity structure with a top removed of a sounder module according to an embodiment of the present invention;
fig. 4 is a schematic top view of a front acoustic cavity structure with a top portion removed of a sounder module according to an embodiment of the present invention;
FIG. 5 is a graph illustrating frequency response comparison before and after a folded tube is installed according to an embodiment of the present invention;
fig. 6 is a schematic cross-sectional view of a front acoustic cavity structure with a top removed for a sounder module with a helmholtz resonator according to an embodiment of the present invention.
Detailed Description
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, and it should be understood that the preferred embodiments described below are only for the purpose of illustrating and explaining the present invention, and are not to be construed as limiting the present invention.
Examples
As shown in fig. 1-4, the invention provides a sounder module that includes a module housing and a sounder unit 10 located within the module housing. The module shell comprises a module upper shell 1 and a module lower shell 2, and the sounder monomer 20 is installed and fixed in the module shell. Wherein, the sounder monomer 20 includes vibration system and magnetic circuit, and vibration system includes vibrating diaphragm 101 and combines in the voice coil loudspeaker voice coil of vibrating diaphragm 101 downside, and magnetic circuit corresponds the voice coil loudspeaker voice coil and is equipped with the magnetic gap, and the voice coil loudspeaker voice coil is according to the audio frequency signal of input and is the up-and-down motion in the magnetic gap, and vibrating diaphragm 101 vibrates along with the up-and-down motion of voice coil loudspeaker voice coil, and the air sound production is moved in the tactics to accomplish the energy conversion between the electroacoustic.
The module housing is shown here only as an example and comprises a module upper housing 1 and a module lower housing 2, but in practice, the module housing may also be of other structures, for example, formed by combining more housings, or formed integrally. In some embodiments, at least part of the module housing may also be a complete housing of the intelligent wearable device, that is, the acoustic generator module of embodiment 1 may not have a module housing itself, or only have part of the module housing, and when being applied to the intelligent wearable device, the module housing may be formed by the complete housing of the intelligent wearable device.
The sounder unit 10 is in a strip-shaped structure, is rectangular or track-shaped, and comprises a long shaft side and a short shaft side, wherein the long shaft side corresponds to one side of a straight edge of the sounder unit, and the short shaft side corresponds to the position of an arc edge of the sounder unit. The diaphragm 101 of the sounder unit 10 divides the space in the sounder module into a front sound chamber 11 and a rear sound chamber 12. Because the sounder unit 10 is a strip-shaped structure, the corresponding front sound cavity 11 is a long and narrow cavity. As shown in fig. 1 and 3, the acoustic generator module of the present application is provided with a main sound outlet 3 communicated with a front sound cavity 11, and the main sound outlet 3 is provided at a side surface of the front sound cavity 11 and located at one side of a short axis of an acoustic generator unit. For the sounder module with the front sound cavity of a long and narrow structure and the sound coming out from the short axis side of the front sound cavity, the long and narrow front sound cavity can cause numerous standing wave resonance peaks and valleys to influence the listening experience. The first standing wave valley introduced by the front cavity first-order standing wave resonance has the lowest frequency, particularly influences the flatness of a sensitivity curve and reduces listening experience.
The standing wave valley in the sounder module mainly comes from the interference offset of the reflected wave on the side wall of the front sound cavity and the emergent wave in the sound emitting direction. When the wavelength lambda of the sound wave frequency radiated by the sounder monomer is 2 times of the length of the front sound cavity, the distance from the center of the monomer to the side wall surface of the sound hole of the front sound cavity is lambda/4, the sound wave propagated along the direction is reflected by the wall surface and returns to the center of the monomer for a traveling distance of lambda/2, the phase is just opposite to the phase of the radiated sound wave at the moment, coherent cancellation is caused, the volume speed of the sound hole position is reduced, and the radiation efficiency is reduced to form a standing wave trough. The standing wave valley is not considered on the conventional miniature acoustic generator module, because the frequency generated by the standing wave valley is related to the length of the front acoustic cavity, the shorter the front acoustic cavity is, the higher the frequency is, the standing wave valley in the miniature acoustic generator module is positioned above 15kHz, the auditory range sensed by human ears is exceeded, and the influence on the auditory experience of a user is small. However, for the acoustic generator module installed in the intelligent head-mounted device, because the front acoustic cavity is long and narrow, and the corresponding lambda value is large, the standing wave trough will shift to the low frequency and appear below 10KHz, usually appear at 3-6KHz, and the medium-high frequency sound quality of the user is seriously affected.
Through the verification, for the speaker module that main sound outlet is located the side sound of minor axis side, when the distance between the free center of speaker to second lateral wall 14 was about 8.5mm, standing wave phenomenon can appear in 10KHz department, when the free center of speaker extremely when distance between second lateral wall 14 is greater than 8.5mm, the standing wave valley can appear within 10KHz, can seriously influence user listening experience this moment, the numerical value 8.5mm of this embodiment is based on obtaining after a large amount of statistics experiments are verified, this numerical value is relevant with the sound wave frequency channel that can be perceived by the people's ear.
Aiming at the problem that standing wave interference is easy to occur on the sounder module with a long and narrow front sound cavity because the main sound outlet is positioned on one side of the short shaft of the sounder monomer, the sounder module of the embodiment is provided with an acoustic component for resonance sound absorption, the acoustic component is provided with a communication hole on the opposite side wall surface of the main sound outlet, and the acoustic component is communicated with the front sound cavity 11 through the communication hole.
Specifically, the sound generator module has a first side wall 13 in which the main sound outlet hole 3 is opened, and a second side wall 14 opposite to the first side wall 13, and the acoustic member is provided on the side of the second side wall 14 and provided with a communication hole penetrating the second side wall 14. At this time, when the sound wave emitted from the sounder element 10 radiates to the second side wall 14, under the resonance sound absorption effect of the acoustic component, the reflection of the main sound outlet hole in the front sound cavity to the side wall surface is reduced, so that the reflected sound wave and the emitted sound wave are prevented from generating standing wave interference, the generation of standing waves is avoided, the standing wave valley point influencing the high-frequency flatness in the frequency response curve is eliminated, and the sensitivity of the medium-high frequency band is improved.
The acoustic component resonates at a specific frequency, and preferably, the resonant frequency of the acoustic component is located in a frequency band corresponding to a valley of a standing wave of the acoustic generator module.
Fig. 5 is a graph comparing frequency responses before and after the folding pipe is disposed, where a black curve is a frequency response curve adjusted by the folding pipe, and a gray curve is a frequency response curve adjusted by the non-folding pipe. It can be known through the comparison that the sensitivity of the frequency response curve which is not adjusted is obviously reduced around 4KHz and the standing wave trough appears, and the frequency response curve which is adjusted by the folding pipeline is more gentle in the middle and high frequency band. Specifically, the fluctuation range of the frequency response curve of the position where standing waves appear in the medium and high frequency bands by the unadjusted frequency response curve exceeds 30dB, and the fluctuation range of the frequency response curve corresponding to the position of the original standing wave after the adjustment of the acoustic component is about 10 dB. The standing wave trough is defined as a curve section of a frequency response curve from a point of beginning to descend to a point of stopping ascending at the lowest point of the curve, namely a curve section between the top of a resonance peak on the left side of the lowest point of the standing wave trough and the top of a resonance peak on the right side of the lowest point of the standing wave trough. The frequency band between the point where the frequency response curve corresponding to the standing wave trough starts to fall and the point where the frequency response curve stops rising is the frequency band corresponding to the standing wave trough (or the frequency band where the standing wave trough is located). When the resonance frequency of the acoustic member is within the frequency band in which the standing wave valley is located, the sensitivity of the frequency band in which the standing wave valley is located is significantly improved.
In order to further improve the sensitivity of the standing wave trough frequency band, the acoustic components are multiple, and any one of the acoustic components is independently communicated with the front sound cavity through the communication hole, so that multiple independent acoustic components with specific resonant frequency are formed. The resonance sound absorption structure only has higher sound absorption efficiency during resonance, a single acoustic component only has a narrow resonance peak, and the frequency response curve can be more smoothly finished by arranging the resonance frequency equal bandwidth of a plurality of folding pipelines according to the bandwidth range of the standing wave trough. The number of the acoustic components is three, the resonance frequencies of the three acoustic components are all located in the frequency band where the standing wave valley is located, the three resonance frequencies are distributed in equal bandwidth, the three resonance frequencies distributed in equal bandwidth obviously improve the sensitivity of the frequency band corresponding to the standing wave valley, and the frequency response curve of the middle-high frequency is more smooth. As shown in fig. 6, the three arrows indicate the formants formed by the three acoustic components, and due to the existence of the three formants, the frequency response curve corresponding to the standing wave valley is pulled up, so that the frequency response curve of the middle and high frequency bands is smooth, and the listening experience for the sound is improved. The specific frequency bands of the standing wave troughs corresponding to the resonance frequencies of the three acoustic components with equal bandwidth distribution of the resonance frequencies can be obtained through simulation calculation, so that the standing wave troughs can be effectively filled.
The number of the folding pipes is not limited to three, and may be one or two. When the number of the acoustic elements is one, the resonance frequency of the acoustic element is a frequency at a middle region of the valley band of the standing wave. When the number of the acoustic components is two, the frequency of the frequency band where the standing wave valley corresponding to the resonance frequency of the two acoustic components is located needs to be obtained through simulation and calculation, so that the standing wave valley can be effectively filled.
As an embodiment, the acoustic component is a folded pipeline, one end of the folded pipeline is closed, and the other end of the folded pipeline is used as a communication hole to be communicated with the front sound cavity 11.
In the embodiment shown in fig. 3 and 4, the acoustic member is a folded pipe provided on one side of the second side wall 14 and disposed near the other short axis side of the sound emitting device 10, and the folded pipe is provided with a communication hole penetrating the second side wall 14.
Taking the folded duct 41 as an example, the folded duct 41 is formed by spacing the partition plates 411 at equal intervals, and the folded duct 41 extends from the closed end to the second sidewall 14 and penetrates the second sidewall 14 to form the communication hole 410 communicating with the front acoustic chamber. Compared with a straight pipe or other folded pipes, the folded pipe 41 formed by the partition 411 at intervals can make full use of the internal space of the sounder module.
The number of the folding pipelines is at least two, and the equivalence degrees between any two folding long pipelines are different. The number of the folding pipelines is at least three, and the resonant frequencies of the at least three folding pipelines are distributed in equal bandwidth. The present embodiment further includes the folded duct 42 and the folded duct 43, the folded duct 42 and the folded duct 43 are also formed by spacing partition plates disposed at equal intervals, the folded duct 42 is formed by spacing a plurality of partition plates 421, the folded duct 43 is formed by spacing a plurality of partition plates 431, and the folded duct 42 and the folded duct 43 are respectively provided with a communication hole 421 and a communication hole 431 communicating with the front sound chamber 11, thereby forming an independent acoustic part. The distances between the partition boards of the folded pipes 41, the folded pipes 42 and the folded pipes 43 may be the same or different.
When the number of the acoustic components is three, the resonance frequency of one of the acoustic components is the frequency corresponding to the lowest point of sensitivity of the standing wave valley. The lowest point of the standing wave valley sensitivity refers to the lowest point of the frequency response curve corresponding to the frequency band of the standing wave valley, the resonant frequency of the folded pipeline 42 is the same as the resonant frequency of the lowest point of the standing wave valley, and the resonant frequency of the folded pipeline 42 is the same as the frequency of the lowest point of the standing wave valley sensitivity because the frequency of the lowest point of the standing wave valley sensitivity is the frequency needing important lifting, so that the standing wave problem can be solved more specifically.
The equivalent length of the folding pipeline determines the resonance frequency of the folding pipeline, and the equivalent length of the folding pipeline is the sum of the lengths of all the sections of pipelines. The equivalent lengths of the differently folded conduits are typically not the same due to the different resonant frequencies of the differently folded conduits. Optionally, the equivalent lengths of the folding pipes 41, 42 and 43 are distributed in an equal difference manner, and the resonant frequencies of the three folding pipes are distributed in an equal bandwidth within the frequency band where the standing wave valley is located, and uniformly cover the standing wave valley. At this time, the spacing between the partition plates in the three folded pipes is equal.
It should be understood that the folded tube can also be in the form of a non-barrier partition, and any tube formed by a serpentine extension from the closed end to the second sidewall 14 can be understood to be a folded tube. In addition, the folding pipeline may be of a structure having an equal cross section or an unequal cross section, or the folding pipeline formed by a plurality of partition plates at intervals may have different intervals between the partition plates, as long as the resonance frequency of the folding pipeline is within the frequency band where the standing wave trough is located. The three folding pipelines can be folding pipelines in the same form or folding pipelines in different forms on the premise of meeting the condition that the resonance frequency of the folding pipelines is located in the frequency band where the standing wave trough is located and the bandwidth distribution is equal.
The three folding pipelines of this embodiment are all disposed on the upper side of the diaphragm 101, and occupy the physical space on the upper side of the diaphragm 101 in the acoustic generator module. Or, any folding pipeline may also occupy the physical space on the upper side and the lower side of the diaphragm 101 in the sounder module at the same time, for example, the communication hole of the folding pipeline is located on the upper side of the diaphragm 101, and the closed end occupies the physical space on the lower side of the diaphragm 101 in the sounder module.
In another embodiment of the present application, the acoustic member is a helmholtz resonator, and an open end of the helmholtz resonator is communicated with the front sound chamber 11 as a communication hole. As shown in fig. 6, taking the helmholtz resonator 51 as an example, the helmholtz resonator 51 includes a chamber 511 and a communication hole 510, and the chamber 511 and the communication hole 510 define the resonance frequency of the helmholtz resonator 51.
Wherein, the quantity of helmholtz resonator can be one or more, and when the quantity of helmholtz resonator was one, the resonant frequency of helmholtz resonator corresponded the frequency channel of the middle zone of frequency channel that the standing wave trough was located, and when the quantity of helmholtz resonator was a plurality of, the resonant frequency of a plurality of helmholtz resonators all was located the frequency channel that the standing wave trough was located, and the equal bandwidth distribution.
In this embodiment, the number of helmholtz resonators is at least three, and the resonant frequencies of at least three helmholtz resonators are distributed in equal bandwidth. The helmholtz resonator shown in fig. 6 includes helmholtz resonator 51, helmholtz resonator 52, and helmholtz resonator 53, and three resonators communicate with the front acoustic cavity through communication hole 510, communication hole 520, and communication hole 530, respectively, and the cavity volumes of this application cavity 511, cavity 521, and cavity 531 are different. The communication hole 510, the communication hole 520, and the communication hole 530 may have the same cross-sectional size or different cross-sectional sizes, as long as the resonance frequencies of the three resonators are distributed in equal bandwidths.
The three helmholtz resonators of this embodiment may all be disposed on the upper side of the diaphragm 101 and occupy the physical space on the upper side of the diaphragm 101 in the acoustic generator module. Or, any helmholtz resonator can occupy the physical space of vibrating diaphragm 101 upside and downside simultaneously, and the intercommunicating pore of helmholtz resonator can be located the upside of vibrating diaphragm 101, and the cavity can occupy the space of vibrating diaphragm 101 upside and downside, or only occupy the physical space of vibrating diaphragm 101 downside in the sounder module.
It should be noted that the types of the acoustic members of the present application may be different, for example, when two acoustic members are provided, one of the two acoustic members is a folded pipe, and the other one is a helmholtz resonator, and such a solution is also within the scope of the present application.
In addition, the equal bandwidth distribution referred to in the present application is not an equal difference distribution in the strict sense of the frequency value, and may have an error within a reasonable range as long as the equal bandwidth distribution is substantially obtained.
Fig. 1 is a schematic view of a local structure of an intelligent head-mounted device, and a main sound outlet 3 of the intelligent head-mounted device is arranged close to a human ear 6, so that the human ear can directly listen to sound waves radiated from a front sound cavity of a sounder module. Intelligence head-mounted apparatus is still let out the phonate hole including the back chamber that communicates vocal ware module back vocal chamber, and main phonate hole and back chamber let out the phonate hole and form the dipole, can form far field amortization, protection user privacy.
The intelligent head-mounted equipment comprises a whole machine shell, and the whole machine shell forms at least part of the structure of a module shell of the sounder module.
It should be noted that, the module shell of this application vocal ware module can be the complete machine shell of intelligent head-mounted apparatus, and the vocal ware monomer is directly assembled to intelligent head-mounted apparatus promptly, and the complete machine shell of intelligent head-mounted apparatus is as the module shell of vocal ware. Or the partial structure of the module shell of the sounder module is the whole machine shell of the intelligent head-mounted device, for example, the module upper shell 1 of the sounder module can be the whole machine shell of the intelligent head-mounted device, or the module lower shell 2 of the sounder module is the whole machine shell of the intelligent head-mounted device.
Fig. 2-4 and 6 are schematic drawings, in which the module housing is a housing of the smart headset, it should be understood that the module housing of the sounder module may be a different component from the whole housing, that is, after the sounder unit is assembled to the module housing, the sounder module is assembled to the whole housing as a whole. At the moment, the main sound outlet of the sounder module is arranged corresponding to the sound outlet on the whole shell, and the sound wave of the front sound cavity of the sounder module is led out. Such a solution is also within the scope of protection of the present application.
While the foregoing is directed to embodiments of the present invention, other modifications and variations of the present invention may be devised by those skilled in the art in light of the above teachings. It will be understood by those skilled in the art that the foregoing detailed description is for the purpose of illustrating the invention rather than the foregoing detailed description, and that various changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (13)

1. A sounder module comprises a module housing and a sounder monomer positioned in the module housing, wherein a vibration membrane of the sounder monomer divides the space in the sounder module into a front sound cavity and a rear sound cavity,
the sounder module is provided with a main sound outlet communicated with the front sound cavity, and the main sound outlet is arranged on the side surface of the front sound cavity and positioned on one side of the short shaft of the sounder monomer;
the distance from the center position of the sounder monomer to the side wall surface of the main sound outlet hole is not less than 8.5 mm;
and an acoustic component for resonance sound absorption is arranged in the acoustic generator module, a communication hole is formed in the side wall surface of the main sound outlet hole, and the acoustic component is communicated with the front sound cavity through the communication hole.
2. The acoustic generator module of claim 1, wherein the resonant frequency of the acoustic member is within a frequency band corresponding to a valley of a standing wave of the acoustic generator module.
3. A sounder module according to claim 2, wherein said acoustic member is plural, any of said acoustic members communicating individually with said front cavity through respective communication apertures.
4. The sounder module according to claim 2, wherein the number of acoustic elements is three, and wherein the resonant frequency of one acoustic element is the frequency corresponding to the lowest point of sensitivity of the standing wave trough.
5. The sounder module according to claim 1, wherein at least a portion of the module housing is a unitary housing of a smart headset.
6. A sounder module according to any one of claims 1 to 5, wherein the acoustic member is a folded tube closed at one end and communicating with the front sound chamber as a communication aperture at the other end.
7. A sounder module according to claim 6, wherein each folded tube is formed from equally spaced baffles spaced from one another.
8. The sounder module according to claim 6, wherein the number of folded tubes is at least two, and the equivalent length between any two folded tubes is different.
9. The sounder module according to claim 6, wherein the number of folded tubes is at least three, and the resonant frequencies of at least three of the folded tubes are in equal bandwidth distribution.
10. A sounder module according to any of claims 1 to 5, wherein the acoustic member is a Helmholtz resonator, the open end of which communicates with the front sound chamber as a communicating aperture.
11. The sounder module according to claim 10, wherein the number of helmholtz resonators is at least three, and the resonant frequencies of at least three of the helmholtz resonators are distributed with equal bandwidths.
12. An intelligent headset, characterized in that the intelligent headset comprises a sounder module according to any one of claims 1-11.
13. The smart headset of claim 12, comprising a complete housing that forms at least part of the structure of the module housing of the sounder module.
CN202210346250.5A 2022-03-31 2022-03-31 Sounder module and intelligent head-mounted equipment Pending CN114745631A (en)

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