WO2013114864A1 - イヤホン - Google Patents
イヤホン Download PDFInfo
- Publication number
- WO2013114864A1 WO2013114864A1 PCT/JP2013/000471 JP2013000471W WO2013114864A1 WO 2013114864 A1 WO2013114864 A1 WO 2013114864A1 JP 2013000471 W JP2013000471 W JP 2013000471W WO 2013114864 A1 WO2013114864 A1 WO 2013114864A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- earphone
- speaker unit
- sound
- braking portion
- braking
- Prior art date
Links
- 239000004745 nonwoven fabric Substances 0.000 claims description 6
- 239000002759 woven fabric Substances 0.000 claims description 6
- 238000013016 damping Methods 0.000 abstract description 6
- 238000009423 ventilation Methods 0.000 abstract 2
- 239000011553 magnetic fluid Substances 0.000 description 19
- 238000010586 diagram Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 10
- 210000000613 ear canal Anatomy 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 239000004744 fabric Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 210000003454 tympanic membrane Anatomy 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Images
Classifications
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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
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic 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
- H04R1/22—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
- H04R1/2811—Enclosures comprising vibrating or resonating arrangements for loudspeaker transducers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
- H04R25/02—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception adapted to be supported entirely by ear
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
- H04R25/48—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception using constructional means for obtaining a desired frequency response
-
- 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
- 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
Definitions
- the present disclosure relates to an earphone, and more particularly to an earphone capable of adjusting sound pressure frequency characteristics.
- the lowest resonance frequency of the speaker unit is lowered to several hundreds Hz by using a magnetic fluid.
- this speaker unit it is possible to increase low frequency characteristics in a television or a mobile phone as compared with a conventional speaker unit.
- the low frequency characteristic is a high frequency characteristic. Since it is excessive in comparison, it is necessary to adjust some sound pressure frequency characteristics.
- Patent Document 1 As a prior art document related to the present disclosure, for example, Patent Document 1 is known, in which a volume is provided on the back of the speaker unit in the housing in which the speaker unit is installed, and the size of the volume provided on the back of the speaker unit is adjusted. Thus, the configuration of the earphone capable of adjusting the sound pressure frequency characteristic is disclosed.
- the lowest resonance frequency of the speaker unit can be raised by providing a volume at the back of the speaker unit.
- the sound pressure level difference generated in the low region lower than the lowest resonance frequency and the high region higher than the lowest resonance frequency is improved.
- the Q value at the lowest resonance frequency increases, and a peak is formed.
- the configuration of the conventional earphone there is a problem that the sound pressure level becomes constant in the low band lower than the lowest resonance frequency, and the sound pressure frequency characteristic in the low band can not be freely adjusted.
- the present disclosure aims to provide an earphone capable of suppressing a peak generated when the lowest resonance frequency is increased and further freely adjusting the sound pressure frequency characteristic in a low frequency range. I assume.
- an earphone is connected to a front surface having a speaker unit and a diaphragm included in the speaker unit, and a sound conduit having a hole for emitting a sound generated from the speaker unit. And a housing having a first vent hole connected to the back of the speaker unit with a space and connecting the space and the outside air, a first braking portion for closing the sound hole of the speaker unit, and a first through hole And a second braking portion for closing the pores.
- the sound pressure frequency characteristics suitable for the earphone can be realized by using the two braking portions.
- FIG. 1A is a schematic cross-sectional view showing the configuration of the earphone in the first embodiment of the present disclosure.
- FIG. 1B is a schematic cross-sectional view taken along line A-A 'of FIG. 1A.
- FIG. 2 is a schematic cross-sectional view showing the configuration of another example of the earphone according to the first embodiment of the present disclosure.
- FIG. 3 is a schematic cross-sectional view showing the configuration of another example of the earphone according to the first embodiment of the present disclosure.
- FIG. 4 is a diagram showing sound pressure frequency characteristics related to the first braking unit in the first embodiment of the present disclosure.
- FIG. 5 is a diagram showing sound pressure frequency characteristics related to the second braking unit in the first embodiment of the present disclosure.
- FIG. 6 is a schematic cross-sectional view showing a configuration when using an earphone in the first embodiment of the present disclosure.
- FIG. 7 is a schematic cross-sectional view showing the configuration of another example of the earphone according to the first embodiment of the present disclosure.
- FIG. 8 is a schematic cross-sectional view showing the configuration of the earphone in the second embodiment of the present disclosure.
- FIG. 9 is a diagram showing sound pressure frequency characteristics of the earphone according to the second embodiment of the present disclosure.
- FIG. 10 is a schematic cross-sectional view showing the configuration of another example of the earphone according to the second embodiment of the present disclosure.
- FIG. 11 is a schematic cross-sectional view showing the configuration of the earphone in the third embodiment of the present disclosure.
- FIG. 12 is a diagram showing sound pressure frequency characteristics of the earphone according to the third embodiment of the present disclosure.
- FIG. 13 is a schematic cross-sectional view showing the configuration of another example of the earphone according to the third embodiment of the present disclosure.
- FIG. 14 is a diagram showing an example of the appearance of the hearing aid in the mounting example of the present disclosure.
- FIG. 15 is a schematic cross-sectional view showing the configuration of a conventional earphone.
- FIG. 16 is a diagram showing sound pressure frequency characteristics according to the presence or absence of the back volume in the conventional earphone.
- FIG. 15 is a schematic cross-sectional view showing the configuration of a conventional earphone 1000.
- the conventional earphone 1000 includes a speaker unit 1001, a housing 1002, a sound output hole 1003 provided in the housing 1002, and a back panel 1004 fitted to the housing 1002.
- the user adjusts the size of the back volume formed by the speaker unit 1001, the housing 1002 and the back panel 1004 by replacing the back panel 1004 of the earphone 1000, and selects a desired lowest resonance frequency.
- FIG. 16 is a diagram showing sound pressure frequency characteristics according to the presence or absence of the back volume in the conventional earphone 1000.
- the horizontal axis is frequency
- the vertical axis is sound pressure level.
- the sound pressure frequency characteristics in a state in which the rear volume is not provided is a solid line, and in a state where the rear volume is provided (that is, the configuration in which the rear panel 1004 is provided in the earphone 1000).
- the sound pressure frequency characteristics of are shown by dotted lines. As shown in FIG.
- the lowest resonance frequency rises from f'0 to f0, and the sound pressure level in the low band lower than the lowest resonance frequency f0 and the height higher than the lowest resonance frequency f0 It can be confirmed that the difference with the sound pressure level of the region can be adjusted.
- the conventional earphone 1000 as described above has the following problems.
- a peak is formed at the lowest resonance frequency f0.
- the sound pressure level becomes constant in the frequency range lower than the lowest resonance frequency f0, and the sound pressure frequency characteristics in the low band lower than the lowest resonance frequency f0 can not be freely adjusted .
- a method of adjusting the sound pressure frequency characteristic a method is further known in which a vent is provided in the back panel 1004 to adjust the sealing property in the housing 1002.
- the peak generated when the lowest resonance frequency is increased is sufficiently suppressed, and the sound pressure frequency characteristics in the low region lower than the lowest resonance frequency f0 are freely adjusted. I can not
- the inventors of the present invention have proposed a configuration of an earphone capable of suppressing the peak that occurs when the lowest resonance frequency is increased, and freely adjusting the sound pressure frequency characteristics in the low band lower than the lowest resonance frequency.
- Various aspects of the present disclosure based on this invention are as follows.
- An earphone is connected to a front surface having a speaker unit and a diaphragm included in the speaker unit, and has a sound conduit having a hole for emitting a sound generated from the speaker unit
- a housing having a first vent connecting the space and the outside air, a first braking portion closing the sound hole of the speaker unit, and a second braking portion closing the first vent Equipped with
- the first braking portion and the second braking portion are non-woven fabric or woven fabric.
- the speaker unit side of the sound conduit further includes a third braking portion that closes the hole of the sound conduit.
- An earphone is a speaker unit, and a sound conduit connected to a surface opposite to the front surface having a diaphragm included in the speaker unit and emitting a sound generated from the speaker unit.
- a housing is connected with a space in front of the speaker unit and has a first vent connecting the space and the outside air, a back plate connected to the front of the speaker unit has a second vent, A first braking portion for closing the second air vent and a second braking portion for closing the first air vent.
- the peak generated with the increase of the lowest resonance frequency is suppressed by the first braking portion, and the sound quality suitable for the earphone is realized by the strength of the braking effect of the second braking portion.
- the high frequency characteristics can be improved by reducing the volume formed between the diaphragm and the sound conduit.
- the first braking portion and the second braking portion are non-woven fabric or woven fabric.
- the speaker unit side of the sound conduit further includes a third braking portion that closes the hole of the sound conduit.
- FIG. 1A is a schematic cross-sectional view of the earphone 100 according to the present embodiment.
- FIG. 1B is a schematic cross-sectional view taken along the line AA ′ in FIG.
- the earphone 100 is configured of a sound conduit 101, a speaker unit 102, a housing 103, a first braking portion 115, and a second braking portion 116 joined to the housing 103.
- the yoke 104, the magnet 105, the plate 106, the sound hole 107, the support 108 having an arched cross section, the diaphragm 109 supported by the support 108, and the support 108 are joined.
- the first braking portion 115 is joined to the yoke 104 so as to close the sound hole 107
- the second braking portion 116 so as to close the first air hole 114 provided in the housing 103.
- the earphone 100 when the sound conduit 101 side is the upper surface, the space between the lower surface of the yoke 104 and the housing 103 is the rear volume. Further, the earphone 100 has a plurality of supports 108 (in FIG. 1B, four supports 108 are shown), and the plurality of supports 108 partially support the diaphragm 109 in a vibratable manner. .
- the first braking portion 115 and the second braking portion 116 may be made of any material as long as a braking cloth, a plurality of through holes and the like can be applied with a braking effect.
- it is made of a mesh-like non-woven fabric or woven fabric.
- the first braking portion 115 and the second braking portion 116 may be porous materials packed so as to close the sound holes 107 and the first vent holes 114, respectively.
- the first braking portion 115 is joined to the yoke 104, but may be joined to the plate 106 as shown in FIG.
- the second braking portion 116 is joined to the inside of the earphone 100 in the housing 103, but may be joined to the outside of the earphone 100 as shown in FIG.
- the first vent hole 114 is provided on the bottom wall of the housing 103, but as shown in FIG. It may be provided on the side wall.
- the position where the first vent hole 114 is provided is not particularly limited as long as the first vent hole 114 is provided in a portion not covered by the ear when the earphone 100 is attached to the ear.
- the voice coil 112 vibrates according to Fleming's left-hand rule. Since the voice coil 112 is joined to the diaphragm 109, the diaphragm 109 vibrates in the same direction as the vibration of the voice coil 112. As a result, sound waves are generated from the diaphragm 109. At this time, since the support 108 is partially joined to the diaphragm 109 without surrounding the entire circumference of the diaphragm 109, the compliance of the support 108 is the same as the support surrounding the entire circumference of the conventional diaphragm 109.
- the lowest resonant frequency is several hundred Hz.
- the compliance of the earphone 100 is increased, and the lowest resonance frequency is increased.
- a peak is formed at the lowest resonance frequency, but this peak is reduced by the acoustic damping of the first damping part 115.
- the acoustic damping of the second damping portion 116 determines the sound pressure frequency characteristic of the low frequency band lower than the lowest resonance frequency. Details will be described below.
- FIG. 4 is a diagram showing sound pressure frequency characteristics related to the first braking portion 115 of the earphone 100 according to the present embodiment.
- the horizontal axis is frequency
- the vertical axis is sound pressure level.
- the sound pressure frequency characteristic in a state 1 where the sound conduit 101 is in the front and only the volume is provided on the back of the speaker unit 102 is shown by a solid line
- the sound pressure frequency characteristics in the state 2 provided with the portion 115 are indicated by dotted lines. As shown in FIG.
- a peak is formed at the lowest resonance frequency f0 in the state 1 where only the volume is provided on the rear surface of the speaker unit 102, but as in the state 2, the first braking portion 115 is provided.
- FIG. 5 is a diagram showing sound pressure frequency characteristics related to the second braking unit 116 of the earphone 100 according to the present embodiment.
- the horizontal axis is frequency
- the vertical axis is sound pressure level.
- States 3, 4 and 5 are states where braking materials A, B and C are used for the second braking portion 116 of the earphone 100, respectively.
- the braking effects of the braking materials are the braking materials A, B, and C in descending order, and the braking material A is in a substantially sealed state in which no sound is transmitted to the first vent hole 114. , C make it difficult for sound to pass through the first vent 114 in this order.
- FIG. 1 the horizontal axis is frequency
- the vertical axis is sound pressure level.
- States 3, 4 and 5 are states where braking materials A, B and C are used for the second braking portion 116 of the earphone 100, respectively.
- the braking effects of the braking materials are the braking materials A, B, and C in descending order, and
- the state 3 is indicated by a solid line
- the state 4 is indicated by a dotted line
- the state 5 is indicated by an alternate long and short dash line.
- the rear volume, the first braking portion 115, and the second braking portion 116 are provided even when the speaker unit 102 having a low minimum resonance frequency is applied to the earphone 100. Therefore, sound pressure frequency characteristics suitable for the earphone 100 can be realized.
- the braking is performed when the magnetic fluid 113 is scattered due to the drop impact of the earphone 100 or the like.
- the cloth can absorb the magnetic fluid 113 and prevent the magnetic fluid 113 from flowing out of the earphone 100.
- FIG. 6 is a schematic cross-sectional view showing the configuration of an earphone 500 that actually uses the earphone 100 according to the present embodiment.
- the earphone 500 has an ear tip 501, a terminal 502, a wire 503, and a cord 504 including the wire 503. Further, although not shown, a rubber plug is packed in a hole through which the cord 504 provided in the housing 103 passes, and the hole is sealed.
- the internal configuration of the earphone 500 is the same as the configuration of the earphone 100 described above.
- the operation when the earphone 500 configured as described above is fixed in the ear canal by the ear tip 501 will be described. Since the voice coil 112 and the wire 503 are connected to the terminal 502, the electrical signal output from the device connected to the wire 503 is transmitted to the voice coil 112, and according to the Fleming's left-hand rule, the voice coil 112 vibrates. Since the voice coil 112 is joined to the diaphragm 109, the diaphragm 109 vibrates in the same direction as the vibration of the voice coil 112. As a result, sound waves are generated from the diaphragm 109. The generated sound waves reach the tympanic membrane via the sound conduit 101, the ear tip 501 and the ear canal, and the user perceives the sound waves.
- the sound pressure suitable for the earphone 500 even for the speaker unit 102 with a low lowest resonance frequency. Since the frequency characteristics can be realized, the user of the earphone 500 can realize high sound quality.
- the support 108 for supporting the diaphragm 109 is partially joined to the diaphragm 109, but the support 108 is joined to the entire periphery of the diaphragm 109. It may be
- the magnetic fluid 113 is generated by the sound wave of the opposite phase to the sound wave generated from the vibration plate 109 toward the sound conduit 101, from the side opposite to the sound conduit 101 of the vibration plate 109 toward the sound conduit 101. It is provided to prevent that.
- the magnetic fluid 113 is not an essential configuration in the present disclosure because it can be prevented from being generated toward the sound conduit 101 from the side opposite to the sound conduit 101 of the diaphragm 109. That is, the magnetic fluid 113 may be eliminated from the earphone 100, and the support 108 may be joined to the entire circumference of the diaphragm 109.
- a third braking portion 119 joined to the conduit 101 may be provided.
- FIG. 8 is a schematic cross-sectional view of the earphone 600 according to the present embodiment.
- the earphone 600 is connected to the back plate 617 so as to close the sound conduit 601, the speaker unit 602, the housing 603, the back plate 617, and the second vent holes 618 provided in the back plate 617.
- the speaker unit 602 is joined to the yoke 604, the magnet 605, the plate 606, the sound hole 607, the support 608 having an arched cross section, the diaphragm 609 supported by the support 608, and the support 608 Frame 610, a magnetic gap 611 formed by the yoke 604 and the plate 606, a voice coil 612 held in the magnetic gap 611, and in the magnetic gap 611, between the plate 606 and the voice coil 612 And the magnetic fluid 613 filled in the
- the back plate 617 is also joined to the frame 610.
- the voice coil 612 When an electrical signal is input to the voice coil 612, the voice coil 612 vibrates and a sound wave is generated from the diaphragm 609, as in the first embodiment.
- a large difference from the first embodiment is that the sound wave that has passed through the sound hole 607 is directed to the user's ear canal via the sound conduit 601.
- the volume formed between the diaphragm 609 and the sound conduit 601 can be reduced as compared to the first embodiment.
- the volume formed between the diaphragm 609 and the sound conduit 601 is reduced to the volume formed between the diaphragm 609 and the sound hole 607. Since the volume formed between the above-described diaphragm 609 and the sound conduit 601 has the function of lowering the high frequency characteristic, the high frequency characteristic is improved in this embodiment compared to the first embodiment. be able to.
- the first braking portion 615 can not be provided in the rear volume of the speaker unit 602. Therefore, the back plate 617 is provided inside the housing 603 which is the back surface of the speaker unit 602, and the first braking portion 615 is joined so as to close the second vent hole 618 formed in the back plate 617.
- FIG. 9 is a diagram showing sound pressure frequency characteristics of earphone 600 according to the present embodiment.
- the horizontal axis is frequency
- the vertical axis is sound pressure level.
- the sound pressure frequency characteristic of the state 3 shown in the first embodiment is indicated by a solid line
- the sound pressure frequency characteristic of the state 6 of the present embodiment is indicated by a dotted line.
- braking materials having the same braking effect are used, and a second braking portion 116 in state 3;
- a third brake 619 joined to the conduit 601 may be provided.
- FIG. 11 is a schematic cross-sectional view of the earphone 800 according to the present embodiment.
- the earphone 800 comprises a sound conduit 801, a speaker unit 802, a housing 803, and a second braking portion 816 joined to the housing 803 so as to close a first vent 814 provided in the housing 803. Ru.
- the speaker unit 802 is joined to the yoke 804, the magnet 805, the plate 806, the sound hole 807, the support 808 having an arched cross section, the diaphragm 809 supported by the support 808, and the support 808 Frame 810, a magnetic gap 811 formed by the yoke 804 and the plate 806, a voice coil 812 held in the magnetic gap 811, and a magnetic gap 811 between the plate 806 and the voice coil 812 And the magnetic fluid 813 filled in the
- the operation when the earphone 800 configured as described above is mounted in the ear canal will be described.
- An electric signal is input to the voice coil 812, the voice coil 812 vibrates, and a sound wave is generated from the diaphragm 809 as in the second embodiment.
- a major difference from the second embodiment is that the first braking portion is not provided.
- the diaphragm 609 in order to reduce the volume formed between the diaphragm 609 and the sound conduit 601 in order to improve the high frequency characteristic, the diaphragm 609 is convex on the side opposite to the sound conduit 601. It has a similar structure.
- the back plate 617 needs to be provided inside the housing 603.
- the number of parts is reduced by using the viscosity of the magnetic fluid 813 instead of providing the first braking portion and the back plate as means for suppressing the peak of the lowest resonance frequency. .
- FIG. 12 is a diagram showing sound pressure frequency characteristics of the earphone 800.
- States 7, 8 and 9 are states in which magnetic fluids A, B and C are used as the magnetic fluid 813 of the earphone 800, respectively.
- the viscosity of each magnetic fluid is magnetic fluid A, B, and C in ascending order.
- the state 7 is indicated by a solid line
- the state 8 is indicated by a dotted line
- the state 9 is indicated by an alternate long and short dash line. From FIG. 12, it can be understood that the peak at the lowest resonance frequency can be suppressed by increasing the viscosity of the magnetic fluid 813.
- the magnetic fluid 813 is injected into the region surrounded by the plate 806 and the voice coil 812 in the magnetic gap 811.
- the entire magnetic gap 811 is made magnetic. Fluid 813 may be injected. Also, by reducing the distance between the voice coil 812 and the plate 806, the braking effect can be increased.
- a third brake 819 joined to the conduit 801 may be provided.
- the housing and the back plate should be provided with the very fine holes as the first vent and the second vent.
- the housing and the back plate should be provided with the very fine holes as the first vent and the second vent.
- FIG. 14 is a view showing the appearance of a hearing aid equipped with any of the earphones according to the first to third embodiments.
- the hearing aid according to the mounting example will be described with reference to FIG.
- the hearing aid shown in FIG. 14 includes a receiver unit 901, a hearing aid body 902, and a lead tube 903.
- the configuration of the receiver unit 901 conforms to the configuration of the earphones according to the first to third embodiments.
- the receiver unit 901 has the configuration of the earphone according to the present disclosure, thereby causing a rise in the minimum resonance frequency although it is a small speaker with little discomfort even when inserted into the ear. It is possible to suppress the peak, freely adjust the sound pressure frequency characteristic of the low frequency band lower than the lowest resonance frequency, and provide a hearing aid that can be used for various users having different required sound pressure frequency characteristics.
- a low band lower than the minimum resonance frequency and a high band higher than the minimum resonance frequency are balanced. Sound pressure frequency characteristics can be provided. As a result, high sound quality can be realized in a hearing aid and an earphone such as a portable music player.
- the earphone according to the present disclosure can be used for AV devices such as a hearing aid and a portable music player.
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- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
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- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- General Health & Medical Sciences (AREA)
- Neurosurgery (AREA)
- Headphones And Earphones (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
Description
この創案に基づいた本開示の様々な態様は、次の通りである。
以下、実施の形態1について説明する。まずは、本実施の形態に係るイヤホン100の構成について説明する。図1Aは、本実施形態に係るイヤホン100の概略断面図である。また、図1Bは、図1AにおけるA-A’線で切断し、矢印Bの方向から見た概略断面図である。イヤホン100は、音導管101と、スピーカユニット102と、ハウジング103と、第一の制動部115と、ハウジング103に接合される第二の制動部116とから構成される。スピーカユニット102は、ヨーク104と、マグネット105と、プレート106と、音孔107と、断面がアーチ状の支持体108と、支持体108で支持される振動板109と、支持体108が接合されるフレーム110と、ヨーク104とプレート106とで形成される磁気空隙111と、磁気空隙111内に保持されるボイスコイル112と、磁気空隙111内であって、プレート106とボイスコイル112との間に充填された磁性流体113とを有する。ここで、第一の制動部115は、音孔107を塞ぐようにヨーク104に接合されており、第二の制動部116は、ハウジング103に設けられた第一の通気孔114を塞ぐようにハウジング103に接合されている。また、イヤホン100においては、音導管101側を上面とすると、ヨーク104の下面とハウジング103との間の空間が背面容積となる。また、イヤホン100は、支持体108を複数(図1Bでは、支持体108が4つの場合を図示)有し、複数の支持体108によって、部分的に振動板109を振動可能に支持している。
以下、実施の形態2に係るイヤホン600について説明する。イヤホン600は、実施の形態1のイヤホン100において、音導管101側を上面とした場合、振動板109がハウジング103の底壁側となるようにスピーカユニット102を反転させ、第二の通気孔が形成された背面板をハウジング内部に設け、第二の通気孔を塞ぐように第一の制動部を背面板に接合されていることを特徴とする。図8は、本実施形態に係るイヤホン600の概略断面図である。イヤホン600は、音導管601と、スピーカユニット602と、ハウジング603と、背面板617と、背面板617に設けられた第二の通気孔618を塞ぐように背面板617に接合される第一の制動部615と、ハウジング603に設けられた第一の通気孔614を塞ぐようにハウジング603に接合される第二の制動部616とから構成される。スピーカユニット602は、ヨーク604と、マグネット605と、プレート606と、音孔607と、断面がアーチ状の支持体608と、支持体608で支持される振動板609と、支持体608に接合されるフレーム610と、ヨーク604とプレート606とで形成される磁気空隙611と、磁気空隙611内に保持されるボイスコイル612と、磁気空隙611内であって、プレート606とボイスコイル612との間に充填された磁性流体613とを有する。また、背面板617は、フレーム610に接合されている。
以下、実施の形態3に係るイヤホン800について説明する。イヤホン800は、実施の形態2のイヤホン600において、第二の通気孔618が形成された背面板617と、第一の制動部615とを設けないことを特徴とする。図11は、本実施の形態に係るイヤホン800の概略断面図である。イヤホン800は、音導管801と、スピーカユニット802と、ハウジング803と、ハウジング803に設けられた第一の通気孔814を塞ぐようにハウジング803に接合される第二の制動部816とから構成される。スピーカユニット802は、ヨーク804と、マグネット805と、プレート806と、音孔807と、断面がアーチ状の支持体808と、支持体808で支持された振動板809と、支持体808に接合されるフレーム810と、ヨーク804とプレート806とで形成される磁気空隙811と、磁気空隙811内に保持されるボイスコイル812と、磁気空隙811内であって、プレート806とボイスコイル812との間に充填された磁性流体813とを有する。
図14は、実施の形態1~3に係るイヤホンのいずれかを搭載した補聴器の外観を示す図である。図14を参照して、搭載例に係る補聴器について説明する。図14に示す補聴器は、レシーバ部901と、補聴器本体902と、リードチューブ903とを備える。レシーバ部901の構成は、実施の形態1~3に係るイヤホンの構成に準じる。
101、601 音導管
102、602、1001 スピーカユニット
103、603、1002 ハウジング
104、604、804 ヨーク
105、605、805 マグネット
106、606、806 プレート
107、607、807 音孔
108、608、808 支持体
109、609、809 振動板
110、610、810 フレーム
111、611、811 磁気空隙
112、612、812 ボイスコイル
113、613、813 磁性流体
114、614、814 第一の通気孔
115、615 第一の制動部
116、616、816 第二の制動部
119、619、819 第三の制動部
501 イヤーチップ
502 端子
503 配線
504 コード
617 背面板
618 第二の通気孔
901 レシーバ部
902 補聴器本体
903 リードチューブ
1003 放音穴
1004 背面パネル
Claims (8)
- イヤホンであって、
スピーカユニットと、
前記スピーカユニットが含む振動板を有する前面に接続され、前記スピーカユニットから発生する音を放音する穴を有する音導管と、
前記スピーカユニットの背面に空間を持たせて接続され、当該空間と外気とをつなぐ第一の通気孔を有するハウジングと、
前記スピーカユニットの音孔を塞ぐ第一の制動部と、
前記第一の通気孔を塞ぐ第二の制動部とを備えることを特徴とする、イヤホン。 - 前記第一の制動部と、前記第二の制動部とが、不織布あるいは織布であることを特徴とする、請求項1に記載のイヤホン。
- 前記音導管の前記スピーカユニット側に、前記音導管の穴を塞ぐ第三の制動部をさらに備えることを特徴とする、請求項1に記載のイヤホン。
- イヤホンであって、
スピーカユニットと、
前記スピーカユニットが含む振動板を有する前面とは反対側の面に接続され、前記スピーカユニットから発生する音を放音する穴を有する音導管と、
前記スピーカユニットの前面に空間を持たせて接続され、当該空間と外気とをつなぐ第一の通気孔を有するハウジングと、
前記スピーカユニットの前面に接続され、第二の通気孔を有する背面板と、
前記第二の通気孔を塞ぐ第一の制動部と、
前記第一の通気孔を塞ぐ第二の制動部とを備えることを特徴とする、イヤホン。 - 前記第一の制動部と、前記第二の制動部とが、不織布あるいは織布であることを特徴とする、請求項4に記載のイヤホン。
- 前記音導管の前記スピーカユニット側に、前記音導管の穴を塞ぐ第三の制動部をさらに備えることを特徴とする、請求項4に記載のイヤホン。
- 請求項1に記載のイヤホンを備える、補聴器。
- 請求項4に記載のイヤホンを備える、補聴器。
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EP13744295.0A EP2811757B1 (en) | 2012-01-30 | 2013-01-29 | Earphone |
JP2013556262A JP6136016B2 (ja) | 2012-01-30 | 2013-01-29 | イヤホン |
US14/003,892 US9319767B2 (en) | 2012-01-30 | 2013-01-29 | Earphone |
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US20140056455A1 (en) | 2014-02-27 |
US9319767B2 (en) | 2016-04-19 |
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