CN108566600A - A kind of sound-producing device and electronic equipment - Google Patents

A kind of sound-producing device and electronic equipment Download PDF

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Publication number
CN108566600A
CN108566600A CN201810395846.8A CN201810395846A CN108566600A CN 108566600 A CN108566600 A CN 108566600A CN 201810395846 A CN201810395846 A CN 201810395846A CN 108566600 A CN108566600 A CN 108566600A
Authority
CN
China
Prior art keywords
sound
producing
shell
flexible sheet
adjusting
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
CN201810395846.8A
Other languages
Chinese (zh)
Inventor
赵燕鹏
房晓斐
荆都
王超
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Goertek Inc
Original Assignee
Goertek Inc
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 Goertek Inc filed Critical Goertek Inc
Priority to CN201810395846.8A priority Critical patent/CN108566600A/en
Publication of CN108566600A publication Critical patent/CN108566600A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06Loudspeakers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02Details
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2400/00Loudspeakers
    • H04R2400/11Aspects regarding the frame of loudspeaker transducers

Abstract

The invention discloses a kind of sound-producing device and electronic equipments.The device includes sounding monomer, shell and adjusting part, the inside of the shell forms accommodating chamber, the sounding monomer is arranged in the accommodating chamber, and the accommodating chamber is divided into the preceding operatic tunes and the rear operatic tunes, it is provided with the through-hole for being connected to the rear operatic tunes and exterior space on the housing, the adjusting part includes the mass block for covering the flexible sheet of the through-hole and being arranged on the flexible sheet, and the adjusting part is configurable for reducing the resonant frequency of sound-producing device.Adjusting part can promote the low frequency response of sound-producing device, and it is small to occupy inner space.

Description

A kind of sound-producing device and electronic equipment
Technical field
The present invention relates to electroacoustic switch technology fields, more particularly, to a kind of sound-producing device and electronic equipment.
Background technology
The resonant frequency f of sound-producing device0, the sound performance of sound-producing device is had a major impact.f0More it is low then, low frequency performance Better.For example, in patch ear, half In-Ear Headphones, bassoon structure design is mostly used, to promote low frequency performance.Bassoon is It is connected to the long and narrow pipeline of the rear operatic tunes and exterior space of earphone.The acoustic mass and acoustic capacitance that bassoon is capable of providing, this makes ear Machine is in the intrinsic f less than monomer0Frequency point at occur resonance, to promote the low frequency frequency response of earphone.
However, bassoon alsies occupy larger inner space while enhancing earphone low-frequency effect, it is unfavorable for earphone Miniaturization Design.
Accordingly, it is desirable to provide a kind of technical solution, to solve the above technical problems.
Invention content
It is an object of the present invention to provide a kind of new solutions of sound-producing device.
According to the first aspect of the invention, a kind of sound-producing device is provided.The device includes sounding monomer, shell and adjusting Component, the inside of the shell form accommodating chamber, and the sounding monomer is arranged in the accommodating chamber, and by the accommodating chamber It is divided into the preceding operatic tunes and the rear operatic tunes, is provided with the through-hole for being connected to the rear operatic tunes and exterior space, the tune on the housing It includes the mass block for covering the flexible sheet of the through-hole and being arranged on the flexible sheet, the adjusting part to save component It is configurable for reducing the resonant frequency of sound-producing device.
Optionally, it is provided with dust-proof screen cloth in the outside of the through-hole or the through-hole.
Optionally, the sound-producing device is loud speaker module or earphone.
Optionally, the sound-producing device is Supra-aural headphone or half In-Ear Headphones.
Optionally, the material of the flexible sheet is PET, PEEK, PU, TPU, TPEE, TPAE, TPS, TPV, TPO and TPC At least one of.
Optionally, the flexible sheet is rounded, oval, rectangle or other regular polygons.
Optionally, the shell includes the front housing snapped together and rear shell, in the inside of the front housing and the rear shell The accommodating chamber is formed, the acoustic aperture that goes out of the sound-producing device is located at front housing, and the through-hole is located at the rear shell, the adjusting part It is arranged in the rear shell.
Optionally, the material of the mass block is metal, alloy or plastics.
Optionally, the flexible sheet is plane flexible sheet;Or
The flexible sheet include the central part positioned at middle part, the interconnecting piece positioned at edge and positioned at the central part and The cross section in the ring portion between the interconnecting piece, the ring portion is arc-shaped;Or
The flexible sheet is planar ring structure, and the mass block is fixed on the inner ring of the flexible sheet.
Optionally, the mass block is bonded in the middle part of the flexible sheet by glue.
According to another aspect of the present invention, a kind of electronic equipment is provided.The electronic equipment includes provided by the invention Sound-producing device.
According to one embodiment of the disclosure, through-hole is provided on the shell of sound-producing device.Adjusting part covers through-hole. Vibratory flow after adjusting part can respond in the operatic tunes and vibrate, the low frequency for passing through the rise in vibration sound-producing device of itself is imitated Fruit makes resonant frequency f0It is extended to more low frequency.
Specifically, flexible sheet is capable of providing acoustic capacitance, and mass block is capable of providing acoustic mass.According to resonant frequency f0It calculates public Formula:
Wherein, M is the acoustic mass of sound-producing device, and C is the acoustic capacitance of sound-producing device.Electricity-of the adjusting part in the sound-producing device In power-acoustic curve, equivalent to increase inductance, this makes f0It can effectively reduce, and the low frequency response of sound-producing device can be effective It is promoted.
Further, since adjusting part is arranged on the shell wall of shell, it is not take up the space of enclosure interior in this way, therefore is conducive to Structure design inside sound-producing device.For example, remaining space can accommodate other function element, it is small-sized electronic equipment has been complied with Change, lightening development trend.
Particularly, adjusting part is arranged in Supra-aural headphone or half In-Ear Headphones, can be effectively reduced low frequency energy Amount loss, effectively promotes the low frequency response of above two earphone.
By referring to the drawings to the detailed description of exemplary embodiment of the present invention, other feature of the invention and its Advantage will become apparent.
Description of the drawings
It is combined in the description and the attached drawing of a part for constitution instruction shows the embodiment of the present invention, and even With its explanation together principle for explaining the present invention.
Fig. 1 is the structural schematic diagram of earphone according to an embodiment of the invention.
Fig. 2 is the sectional view of earphone according to an embodiment of the invention.
Fig. 3 is the exploded view of earphone according to an embodiment of the invention.
Fig. 4 is the schematic diagram of adjusting part according to an embodiment of the invention.
Fig. 5 is earphone according to an embodiment of the invention and the frequency response curve comparison of the earphone of adjusting part is not arranged Figure.
Reference sign:
11:End cap;12:Rear shell ontology;13:Front housing;14:PCB;15:Battery;16:Adjusting part;17:Flexible sheet; 18:Mass block;19:Sounding monomer;20:Screen cloth;21:Through-hole;22:The operatic tunes afterwards;23:The preceding operatic tunes;24:Go out acoustic aperture;25:After let out sound Hole;26:Before let out acoustic aperture.
Specific implementation mode
Carry out the various exemplary embodiments of detailed description of the present invention now with reference to attached drawing.It should be noted that:Unless in addition having Body illustrates that the unlimited system of component and the positioned opposite of step, numerical expression and the numerical value otherwise illustrated in these embodiments is originally The range of invention.
It is illustrative to the description only actually of at least one exemplary embodiment below, is never used as to the present invention And its application or any restrictions that use.
Technology, method and apparatus known to person of ordinary skill in the relevant may be not discussed in detail, but suitable In the case of, the technology, method and apparatus should be considered as part of specification.
In shown here and discussion all examples, any occurrence should be construed as merely illustrative, without It is as limitation.Therefore, other examples of exemplary embodiment can have different values.
It should be noted that:Similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi It is defined, then it need not be further discussed in subsequent attached drawing in a attached drawing.
According to one embodiment of present invention, a kind of sound-producing device is provided.Optionally, sound-producing device is loud speaker module Or earphone.Both sound-producing devices all have the rear operatic tunes 22.The operatic tunes 22 is used to adjust the low-frequency effect of sound-producing device afterwards.
Especially, sound-producing device is half In-Ear Headphones or Supra-aural headphone.Half In-Ear Headphones are basic when wearing It will not stretch into duct or stretch into seldom.Supra-aural headphone covers the ear of user when wearing, without stretching into duct. Both earphones are limited to wearing mode, and what is coupled with duct unlike In-Ear Headphones is very good.Half In-Ear Headphones or Uncontrollable leakage between person's Supra-aural headphone and duct forms high-pass filter, causes the loss of low frequency energy in this way.
It is illustrated by taking earphone as an example below.As Figure 2-3, which includes sounding monomer 19, shell and adjusting part 16.The inside of shell forms accommodating chamber.Sounding monomer 19 is arranged in accommodating chamber, and will be accommodated Chamber is divided into the preceding operatic tunes 23 and the rear operatic tunes 22.
Optionally, sounding monomer 19 is moving-coil type monomer or moving-iron type monomer.By taking moving-coil type monomer as an example, the preceding operatic tunes 23 Positioned at the separate magnetic circuit system side of vibrating diaphragm.The operatic tunes 22 is located at the close magnetic circuit system side of vibrating diaphragm afterwards.Optionally, vibrating diaphragm is flat Template vibrating diaphragm or folding annular diaphragm.The preceding operatic tunes 23 is connected to by going out acoustic aperture 24 with exterior space.
Preferably, screen cloth 20 is covered with going out acoustic aperture 24.Screen cloth 20 can be dust-proof, and can form acoustic resistance, to adjust earphone Sound effect.
The through-hole 21 of the operatic tunes 22 and exterior space after being connected to is provided on shell.For example, the cross section of through-hole 21 is in circle The shapes such as shape, ellipse, rectangle, and run through shell wall along the thickness direction of shell wall.As shown in figure 4, adjusting part 16 includes The mass block 18 for covering the flexible sheet 17 of through-hole 21 and being arranged on flexible sheet 17.Preferably, mass block 18 is set At the middle part of flexible sheet 17, so that the adjustment effect of adjusting part 16 is more accurate.Adjusting part 16 is configurable for reducing The resonant frequency of sound-producing device, i.e. f0
Flexible sheet 17 has the acoustic capacitance of setting.Acoustic capacitance is also referred to as pliable coefficient, is the inverse of the stiffness factor of material.Elasticity On inner wall of the outer edge of diaphragm 17 by the hole wall or shell of glue and through-hole 21.
Mass block 18 has the quality of setting.The sound matter of adjusting part can be adjusted by adjusting the quality of mass block 18 Amount.For example, mass block 18 to be fixed on to the middle part of flexible sheet 17 by glue.Adjusting part 16 can be located at the end of through-hole 21 Or in through-hole 21.Mass block 18 can also be molded into the middle part of flexible sheet 17 by insert injection moulding.
In embodiments of the present invention, through-hole 21 is provided on the shell of sound-producing device.Adjusting part 16 covers through-hole 21. Vibratory flow after adjusting part 16 can respond in the operatic tunes 22 and vibrate.Adjusting part is by providing acoustic mass, with sounding The pliable synergistic effect of the pliable and rear operatic tunes of monomer, come adjust in sound-producing device, low frequency performance.
Specifically, flexible sheet 17 is capable of providing pliable, and mass block 18 is capable of providing acoustic mass.According to resonant frequency f0Meter Calculate formula:
Wherein, M is the acoustic mass of sound-producing device, and C is the acoustic capacitance of sound-producing device.Adjusting part 16 is in the sound-producing device In electricity-power-acoustic curve, equivalent to increase inductance, this makes f0It can effectively reduce, and the low frequency response of sound-producing device is effective It is promoted.
Fig. 5 is earphone according to an embodiment of the invention and the frequency response curve pair of the earphone of adjusting part 16 is not arranged Than figure.Wherein, abscissa represents frequency, unit Hz;Ordinate is sound pressure level, and unit is decibel (dB).A is the one of the present invention The frequency response curve of the earphone of a embodiment;B is the frequency response curve for the earphone that adjusting part 16 is not arranged.
As seen from Figure 5, when frequency is more than 300Hz, two curves essentially coincide.This show adjusting part 16 for The frequency response curve of medium, high frequency influences little.But when frequency is less than 300Hz, curve A is in the top of curve B, this explanation is low The sound pressure level of the earphone of the frequency range embodiment of the present invention is apparently higher than the sound pressure level for the earphone that adjusting part 16 is not arranged.Moreover, frequency Rate is lower, high more of the sound pressure level of earphone of the earpiece sound pressures grade than adjusting part 16 is not arranged of the embodiment of the present invention.As it can be seen that The adjusting part 16 of the embodiment of the present invention can effectively promote the low frequency response of sound-producing device.
Further, since adjusting part 16 is arranged on the shell wall of shell, it is not take up the space of enclosure interior in this way, thus it is advantageous Structure design inside sound-producing device.For example, remaining space can accommodate other function element, it is small-sized electronic equipment has been complied with Change, lightening development trend.
Particularly, adjusting part 16 is arranged in Supra-aural headphone or half In-Ear Headphones, can be effectively reduced low frequency Energy loss effectively promotes the low frequency response of above two earphone.
In one example, it is provided with dust-proof screen cloth in the outside of through-hole 21 or through-hole 21.Dust-proof screen cloth can have Prevent external dust from entering accommodation space to effect.Preferably, the mesh size of dust-proof screen cloth, should make dust-proof screen cloth to sound gas The resistance of stream is small as possible, avoids generating big acoustic resistance.
Optionally, the material of flexible sheet 17 is PET (polyester resin), PEEK (polyether-ether-ketone), PU (polyurethane Ester), TPU (thermoplastic polyurethane elastomer), TPEE (thermoplastic polyester elastomer), TPAE (6 thermoplastic elastomer (TPE) of nylon), TPS (styrene analog thermoplastic elastomer), TPV (Dynamic Vulcanized Thermoplastic Elastomer), TPO (olefin hydrocarbons thermoplasticity elastic body) At least one of with TPC (thermoplastic based composites).The acoustic capacitance of above-mentioned material is big, pliable good, can more effectively promote sounding The low-frequency effect of device.
Optionally, flexible sheet 17 is rounded, oval, rectangle or other regular polygons.For example, other are just polygon Shape is equilateral triangle, regular pentagon, regular hexagon etc..Those skilled in the art can select according to actual needs.
In one example, flexible sheet 17 is plane flexible sheet.The outer edge and shell of plane flexible sheet Connection.For example, being fixed by glue.Middle part is used for fixed mass block 18.This flexible sheet 17 is simple in structure, makes and holds Easily.
Either, flexible sheet 17 includes the central part for being located at middle part, positioned at the interconnecting piece at edge and positioned at central part Ring portion between interconnecting piece.The cross section in ring portion is arc-shaped.I.e. flexible sheet 17 is ring vibrating diaphragm.Ring portion can be promoted The vibrating effect of flexible sheet 17, to further promote the low frequency response of sound-producing device.Interconnecting piece with shell for connecting.Matter Gauge block 18 is fixed on central part.For example, mass block 18 is fixed by glue.
It is also possible that flexible sheet 17 is planar ring structure.Mass block 18 is fixed on the inner ring of flexible sheet 17.Bullet The outer edge of property diaphragm 17 is connect with shell.For example, being fixed by glue.Relative to plane flexible sheet, plane annular Structure saves raw material.
Optionally, the material of mass block 18 is metal, alloy or plastics.For example, metal material and alloy material are general It is molded by the way of punching press, such as aluminium foil, magnesium alloy and titanium alloy.The punching press of plastic material generally use or injection molding Mode is molded, such as PET (polyester resin), PEN (polyethylene naphthalate), PI (polyimides) and PEEK (polyethers ethers Ketone) etc..The shape of mass block 18 can be round, oval, rectangle or other regular polygons.
Those skilled in the art are by adjusting the acoustic capacitance of flexible sheet 17 and the quality of mass block 18, to adjust sounding dress Set resonant frequency f0
In one example, as shown in Figure 1, shell includes the front housing 13 snapped together and rear shell.In front housing 13 with after The inside of shell forms accommodating chamber.The acoustic aperture 24 that goes out of sound-producing device is located at front housing 13.Through-hole 21 is located at rear shell (for example, rear shell ontology 12).Adjusting part 16 is arranged in rear shell (for example, rear shell ontology 12).
For example, as Figure 2-3, the front housing 13 of earphone.Go out the side that acoustic aperture 24 is opened in front housing 13.It is set going out acoustic aperture 24 It is equipped with screen cloth 20.Front housing 13 further includes letting out acoustic aperture 26 before the operatic tunes 23 and exterior space before being connected to.
PCB14 and battery 15 are provided in the rear shell of earphone.Front housing 13 and rear shell snap together.Sounding single head, which is located at, to be held Receive intracavitary.The split-type design of shell facilitates the installation of sounding monomer 19.For example, the two is connected by glue.Sounding monomer 19 In accommodation space.Battery 15 is connect by PCB14 with sounding monomer 19.PCB14 is also integrated with microphone.The end cap of rear shell The Mike acoustic aperture opposite with microphone is provided on 11.
Rear shell includes rear shell ontology 12 and end cap 11.Rear shell ontology 12 is cylindrical in shape structure.End cap 11 is with rear shell ontology 12 Split type.When mounted, battery 15 and PCB14 are prevented in rear shell ontology 12 first, then again by end cap 11 in rear shell On ontology 12.PCB14 is than battery closer to end cap.This mode facilitates battery 15 and the installation of PCB14.
After being provided with for connection on rear shell ontology 12 acoustic aperture 25 is let out after the operatic tunes 22 and exterior space.After let out acoustic aperture 25 The low-frequency effect of sound-producing device can further be adjusted.
According to another embodiment of the invention, a kind of electronic equipment is provided.For example, electronic equipment is mobile phone, TV Mechanical, electrical brain, intercom, game machine, VR equipment, AR equipment, learning machine, smartwatch, telephone set etc..
The electronic equipment includes sound-producing device provided by the invention.For example, sound-producing device is fixed on the outer of electronic equipment In shell.
The electronic equipment has the characteristics that low-frequency effect is good.
Although some specific embodiments of the present invention are described in detail by example, the skill of this field Art personnel it should be understood that example above merely to illustrating, the range being not intended to be limiting of the invention.The skill of this field Art personnel are it should be understood that can without departing from the scope and spirit of the present invention modify to above example.This hair Bright range is defined by the following claims.

Claims (10)

1. a kind of sound-producing device, which is characterized in that including sounding monomer, shell and adjusting part, the inside of the shell is formed Accommodating chamber, the sounding monomer is arranged in the accommodating chamber, and the accommodating chamber is divided into the preceding operatic tunes and the rear operatic tunes, The through-hole for being connected to the rear operatic tunes and exterior space is provided on the shell, the adjusting part includes the covering through-hole Flexible sheet and the mass block being arranged on the flexible sheet, the adjusting part are configurable for reducing sound-producing device Resonant frequency.
2. sound-producing device according to claim 1, which is characterized in that set in the outside of the through-hole or the through-hole It is equipped with dust-proof screen cloth.
3. sound-producing device according to claim 1, which is characterized in that the sound-producing device is loud speaker module or ear Machine.
4. sound-producing device according to claim 1, which is characterized in that the sound-producing device is Supra-aural headphone or partly enters Aural headphone.
5. sound-producing device according to claim 1, which is characterized in that the material of the flexible sheet be PET, PEEK, PU, At least one of TPU, TPEE, TPAE, TPS, TPV, TPO and TPC.
6. sound-producing device according to claim 1, which is characterized in that the flexible sheet is rounded, oval, rectangle Or other regular polygons.
7. sound-producing device according to claim 1, which is characterized in that the shell include the front housing that snaps together and after Shell forms the accommodating chamber in the inside of the front housing and the rear shell, and the acoustic aperture that goes out of the sound-producing device is located at the front housing, The through-hole is located at the rear shell, and the adjusting part is arranged in the rear shell.
8. sound-producing device according to claim 1, which is characterized in that the material of the mass block be metal, alloy or Plastics.
9. sound-producing device according to claim 1, which is characterized in that the flexible sheet is plane flexible sheet;Or Person
The flexible sheet includes the central part positioned at middle part, the interconnecting piece positioned at edge and positioned at the central part and described The cross section in the ring portion between interconnecting piece, the ring portion is arc-shaped;Or
The flexible sheet is planar ring structure, and the mass block is fixed on the inner ring of the flexible sheet.
10. a kind of electronic equipment, which is characterized in that include the sound-producing device as described in any one in claim 1-9.
CN201810395846.8A 2018-04-27 2018-04-27 A kind of sound-producing device and electronic equipment Pending CN108566600A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810395846.8A CN108566600A (en) 2018-04-27 2018-04-27 A kind of sound-producing device and electronic equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810395846.8A CN108566600A (en) 2018-04-27 2018-04-27 A kind of sound-producing device and electronic equipment

Publications (1)

Publication Number Publication Date
CN108566600A true CN108566600A (en) 2018-09-21

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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201937804U (en) * 2011-01-04 2011-08-17 美律实业股份有限公司 Earshield type earphone capable of improving frequency response effect
CN202268998U (en) * 2011-09-09 2012-06-06 富港电子(东莞)有限公司 In-ear type earphone
CN103475968A (en) * 2013-08-26 2013-12-25 歌尔声学股份有限公司 Earphone
CN103986988A (en) * 2013-02-08 2014-08-13 固昌通讯股份有限公司 Earphone
CN104185102A (en) * 2013-05-21 2014-12-03 宝德科技股份有限公司 Tuning earphone
CN104185103A (en) * 2013-05-21 2014-12-03 宝德科技股份有限公司 Earphone
CN104301838A (en) * 2013-07-18 2015-01-21 Gn奈康有限公司 Earphone with noise reduction
US9319767B2 (en) * 2012-01-30 2016-04-19 Panasonic Intellectual Property Management Co., Ltd. Earphone
CN206061094U (en) * 2016-07-20 2017-03-29 瑞声科技(新加坡)有限公司 Loudspeaker enclosure
CN107371106A (en) * 2017-07-04 2017-11-21 瑞声科技(新加坡)有限公司 Loudspeaker enclosure

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201937804U (en) * 2011-01-04 2011-08-17 美律实业股份有限公司 Earshield type earphone capable of improving frequency response effect
CN202268998U (en) * 2011-09-09 2012-06-06 富港电子(东莞)有限公司 In-ear type earphone
US9319767B2 (en) * 2012-01-30 2016-04-19 Panasonic Intellectual Property Management Co., Ltd. Earphone
CN103986988A (en) * 2013-02-08 2014-08-13 固昌通讯股份有限公司 Earphone
CN104185102A (en) * 2013-05-21 2014-12-03 宝德科技股份有限公司 Tuning earphone
CN104185103A (en) * 2013-05-21 2014-12-03 宝德科技股份有限公司 Earphone
CN104301838A (en) * 2013-07-18 2015-01-21 Gn奈康有限公司 Earphone with noise reduction
CN103475968A (en) * 2013-08-26 2013-12-25 歌尔声学股份有限公司 Earphone
CN206061094U (en) * 2016-07-20 2017-03-29 瑞声科技(新加坡)有限公司 Loudspeaker enclosure
CN107371106A (en) * 2017-07-04 2017-11-21 瑞声科技(新加坡)有限公司 Loudspeaker enclosure

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