CN109429156A - Electret microphone - Google Patents
Electret microphone Download PDFInfo
- Publication number
- CN109429156A CN109429156A CN201710790724.4A CN201710790724A CN109429156A CN 109429156 A CN109429156 A CN 109429156A CN 201710790724 A CN201710790724 A CN 201710790724A CN 109429156 A CN109429156 A CN 109429156A
- Authority
- CN
- China
- Prior art keywords
- contact portion
- elastic slice
- electret microphone
- circuit board
- polar plate
- 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.)
- Granted
Links
- 239000002184 metal Substances 0.000 claims abstract description 44
- 229910052751 metal Inorganic materials 0.000 claims abstract description 44
- 230000000694 effects Effects 0.000 claims abstract description 10
- 230000009471 action Effects 0.000 claims description 3
- 239000003990 capacitor Substances 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 4
- 241000519996 Teucrium chamaedrys Species 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 210000000078 claw Anatomy 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000005489 elastic deformation Effects 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R19/00—Electrostatic transducers
- H04R19/01—Electrostatic transducers characterised by the use of electrets
- H04R19/016—Electrostatic transducers characterised by the use of electrets for microphones
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Abstract
The invention discloses a kind of electret microphones, including the elastic slice for being arranged between metal polar plate and circuit board module, the top of elastic slice is the first contact portion for supporting circuit board module upwards under the effect of elasticity, the bottom of elastic slice is the second contact portion for supporting metal polar plate downwards under the effect of elasticity, the first end of first contact portion is connected with the first end of the second contact portion by interconnecting piece, the second end of first contact portion and the second end of the second contact portion are free end, in the operating condition, the contact point of first contact portion and circuit board module, second contact portion is corresponded with the contact point of metal polar plate and corresponding contact point is located on same vertical line.The uniformity of the plane-parallel capacitor stress of circuit board module and metal polar plate composition can be improved in such electret microphone, improves signal-to-noise ratio.
Description
Technical field
The present invention relates to mike technique field, in particular to a kind of electret microphone.
Background technique
It includes cylindrical gold that Current electronic product, which requires higher and higher, traditional midget microphone mainly to the pickup of sound,
Belong to shell, interior design vibrating diaphragm, insulation spacer, pole plate, claw elastic slice, circuit board module.Wherein, claw elastic slice is because apply
The plane-parallel capacitor discontinuity equalization or Light deformation that power unevenness be easy to cause pole plate and vibrating diaphragm to form, to influence sensitive
Degree, therefore the signal-to-noise ratio of traditional electret microphone is not high, and then it is not high to cause microphone to pick up sound performance.
Therefore, the uniformity for how improving the plane-parallel capacitor stress of circuit board module and metal polar plate composition, is this
The current technical issues that need to address of field technical staff.
Summary of the invention
In view of this, can be improved circuit board module and metal the object of the present invention is to provide a kind of electret microphone
The uniformity of the plane-parallel capacitor stress of pole plate composition.
To achieve the above object, the invention provides the following technical scheme:
A kind of electret microphone, including the elastic slice for being arranged between metal polar plate and circuit board module, the bullet
The top of piece is the first contact portion for supporting the circuit board module upwards under the effect of elasticity, and the bottom of the elastic slice is
For supporting the second contact portion of the metal polar plate downwards under the effect of elasticity, the first end of first contact portion with it is described
The first end of second contact portion is connected by interconnecting piece, and the second of the second end of first contact portion and second contact portion
End is free end, in the operating condition, the contact point of first contact portion and the circuit board module, second contact portion
It is corresponded with the contact point of the metal polar plate and the corresponding contact point is located on same vertical line.
Preferably, the second end of first contact portion and the second end of second contact portion are affixed in the operating condition
It closes, and the middle part of first contact portion has lower male structure with the middle part of convex configuration, second contact portion.
Preferably, it is in tabular and nothing that the second end of first contact portion is corresponding with the second end of second contact portion
Seam fitting.
Preferably, the elastic slice has with respect to the horizontal plane symmetrical structure.
Preferably, first contact portion is convex arch sheet, second contact portion arch sheet convex under being.
Preferably, contact point between the elastic slice and the metal polar plate formed straight line, the elastic slice with it is described
Contact point between circuit board module is formed on another straight line, and two straight lines are corresponding and parallel up and down.
Preferably, the transverse projection of the arch sheet is circular arc line or the broken line at least one corner.
Preferably, the transverse projection of first contact portion and second contact portion is waveform line.
Preferably, the transverse projection of the interconnecting piece is in U-shape, and two free ends of the interconnecting piece are separately connected described
The junction of the first end of the first end of one contact portion and second contact portion, the interconnecting piece and first contact portion,
The equal rounding off in junction of the interconnecting piece and second contact portion.
Preferably, be additionally provided on second contact portion be supported between second contact portion and the metal polar plate and
Connector with electric action.
Electret microphone provided by the invention includes the elastic slice for being arranged between metal polar plate and circuit board module,
The top of elastic slice be for the first contact portion of support circuit board module upwards under the effect of elasticity, the bottom of elastic slice be for
Second contact portion of the lower metal polar plate of support downwards of elastic force effect.Wherein, the first end of the first contact portion and the second contact portion
First end is connected by interconnecting piece, and the second end of the second end of the first contact portion and the second contact portion is free end.In work shape
Under state, the first contact portion and the contact point of circuit board module, the contact point one-to-one correspondence and phase of the second contact portion and metal polar plate
Corresponding contact point is located on same vertical line, and the second end of the first contact portion and the second end of the second contact portion are affixed
It closes.
Due to the corresponding relationship of contact point, bullet that the upward elastic force of the elastic slice that circuit board module is subject to, metal polar plate are subject to
The position of the downward elastic force of piece is opposite, and change in location is more regular, so as to improve circuit board module and metal polar plate group
At plane-parallel capacitor stress uniformity, improve elastic slice contacted between circuit board module, elastic slice and metal polar plate can
Use by property, and the elastic slice can reduce the parasitic capacitance between shell, compare claw elastic piece structure microphone, sensitivity can
To improve 1dB or more, to improve signal-to-noise ratio, properties of product are further promoted.
In a kind of preferred embodiment, the second end of the second end of the first contact portion and the second contact portion is in working condition
Under fit, due to the free end closure of elastic slice in the operating condition, compared to other elastic slices of identical height series, the elastic slice
Under the premise of yield deformation does not occur, broader elastic force working range can be obtained, further increases the frivolous journey of product
Degree, meets the needs of midget microphone structure is frivolous；Meanwhile during the work time, since the free end of elastic slice is closed, Ke Yiti
The stability that high elastic slice itself is placed, is in contact with it elastic slice between component and is not susceptible to relative friction and displacement, make elastic slice, connect
More evenly, the signal transmission between metal polar plate and circuit board module is more reliable for contact portion part stress.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is the cross-sectional view of electret microphone provided by the present invention；
Fig. 2 is the explosive view of electret microphone provided by the present invention；
Fig. 3 is the structural schematic diagram of elastic slice in electret microphone provided by the present invention.
Fig. 1 is into Fig. 3:
100- circuit board module, 101- support cavity, 102- elastic slice, 103- metal polar plate, 104- insulation spacer, 105- vibration
Dynamic diaphragm, 106- metal shell, the first contact portion of 1-, the second contact portion of 2-, 3- interconnecting piece.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Core of the invention is to provide a kind of electret microphone, can be improved circuit board module and metal polar plate composition
The uniformity of plane-parallel capacitor stress.
Fig. 1 to Fig. 3 is please referred to, Fig. 1 is the cross-sectional view of electret microphone provided by the present invention；Fig. 2 is mentioned by the present invention
For the explosive view of electret microphone；Fig. 3 is the structural schematic diagram of elastic slice in electret microphone provided by the present invention.
It should be noted that the upper and lower orientation or positional relationship for waiting instructions is based on attached side shown in FIG. 1 in the present invention
Position or positional relationship, are merely for convenience of description of the present invention and simplification of the description, rather than the device or member of indication or suggestion meaning
Part must have a particular orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In a kind of specific embodiment of electret microphone provided by the present invention, including for being arranged in metal polar plate 103
Elastic slice 102 between circuit board module 100.The top of the elastic slice 102 is for supporting wiring board upwards under the effect of elasticity
First contact portion 1 of component 100, the bottom of the elastic slice 102 are for the of support metal polar plate 103 downwards under the effect of elasticity
Two contact portions 2.The first end of first contact portion 1 is connected with the first end of the second contact portion 2 by interconnecting piece 3, the first contact
The second end in portion 1 and the second end of the second contact portion 2 are free end, wherein elastic slice 102 can integrally all have elasticity.Wherein,
The electret microphone can be for all referring to electret microphone, or Dan Zhixiang electret microphone.
In such electret microphone, elastic slice 102 is double-surface contact type elastic slice, in the operating condition, the first contact portion 1 with
The contact point of the contact point of circuit board module 100, the second contact portion 2 and metal polar plate 103 corresponds, and corresponding contact
Point is located on same vertical line.Wherein, with the change of spacing between metal polar plate 103 and circuit board module 100, elastic slice
102 the first contact portion 1, the second contact portion 2 can elastic deformation simultaneously, so that corresponding contact point pair under free position is answered position
In on same vertical line.
Wherein, the first contact portion 1 and the second contact portion 2 can be metal, so that circuit board module 100 connects by first
Metal polar plate 103 is connected in contact portion 1, the second contact portion 2, realizes that the signal between circuit board module 100 and metal polar plate 103 passes
It leads.
In general, electret microphone includes circuit board module 100, support cavity 101, metal polar plate 103, insulation spacer
104, vibrating diaphragm 105 and metal shell 106, elastic slice 102 be arranged between assist side component 100 and metal polar plate 103 and
Setting is in support cavity 101.
In the present embodiment, due to the corresponding relationship of contact point, the upward elastic force of the elastic slice 102 that circuit board module 100 is subject to,
The position of the downward elastic force of the elastic slice 102 that metal polar plate 103 is subject to is opposite, and change in location is more regular, so as to improve
The uniformity for the plane-parallel capacitor stress that circuit board module 100 and metal polar plate 103 form, improves elastic slice 102 and wiring board
The reliability contacted between component 100, elastic slice 102 and metal polar plate 103 further promotes product to improve signal-to-noise ratio
Energy.
Further, the second end of the first contact portion 1 and the second end of the second contact portion 2 can be affixed in the operating condition
It closes, and the middle part of the first contact portion 1 has lower male structure with the middle part of convex configuration, the second contact portion 2.I.e. in working condition
Under, the free end of the first contact portion 1 and the second contact portion 2, which is formed by, dehisces to be changed into closed state, make the first contact portion 1 with
Closed ring structure is formed between second contact portion 2.
Due to the free end closure of elastic slice 102 in the operating condition, compared to other elastic slices of identical height series, the bullet
Piece 102 can obtain broader elastic force working range, further increase the light of product under the premise of yield deformation does not occur
Thin degree meets the needs of midget microphone structure is frivolous；Meanwhile during the work time, since the free end of elastic slice 102 is closed
It closes, the stability of elastic slice 102 itself placement can be improved, be in contact with it elastic slice 102 between component and be not susceptible to relative friction
And displacement, make elastic slice 102, contact component stress more evenly, the signal transmission between metal polar plate 103 and circuit board module 100
It is more reliable.
Specifically, the second end of the first contact portion 1 can be corresponding in tabular and seamless with the second end of the second contact portion 2
Fitting in order to process, while keeping the stabilization of the free end of the first contact portion 1 and the free end fit-state of the second contact portion
Property.Certainly, the contact surface of the second end of the second end of the first contact portion 1 and the second contact portion 2 may be set to be other can
Seamless applying shape.
Further, the first contact portion 1 can be convex arch sheet, the second contact portion 2 arch sheet convex under being,
That is there is an arcuate part being disposed opposite to each other, elastic slice 102 forms symmetric double arch on the first contact portion 1 and the second contact portion 2
Elastic arm improves the sensitivity of contact to be conducive to reduce the volume of elastic slice 102.
Specifically, the contact point between elastic slice 102 and metal polar plate 103 forms straight line, elastic slice 102 and route board group
Contact point between part 100 is formed on another straight line, and two straight lines are corresponding and parallel up and down, that is, in the operating condition, elastic slice
Between 102 and metal polar plate 103, between elastic slice 102 and circuit board module 100 be always that line contacts, and changing rule is corresponding,
Compared to point contact, stability is higher；Compared to face contact, flexibility is more preferable.
Further, the transverse projection of arch sheet can be circular arc line or the broken line at least one corner, wherein
In broken line at least one corner, line segment between two neighboring corner is straightway, so as to further increase the
The systematicness of the shape of one contact portion 1 and the second contact portion 2 simplifies processing.
Or first the transverse projection of contact portion 1 and the second contact portion 2 can be waveform line, wherein the waveform
Raised or sunken each of line can be fillet or wedge angle, so as to increase contact area, raising support strength.
On the basis of above-mentioned each embodiment, the transverse projection of interconnecting piece 3 can specifically be in U-shape, and two of interconnecting piece 3
Free end is separately connected the first end of the first contact portion 1 and the first end of the second contact portion 2, and interconnecting piece 3 and the first contact portion 1
Junction, interconnecting piece 3 and the second contact portion 2 the equal rounding off in junction.The support that can guarantee elastic slice 102 is arranged in U-shaped
Intensity guarantees to keep appropriately distance between the first end of the first contact portion 1 and the first end of the second contact portion 2.
On the basis of above-mentioned each embodiment, further, it is also provided on the second contact portion 1 and is supported in second
Between contact portion 1 and metal polar plate 103 and the connector with electric action, the setting of connector can be improved elastic slice 102 and exist
The stability placed on metal polar plate 103.Wherein, connector would not influence the normal elastic deformation of the second contact portion 1.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
Electret microphone provided by the present invention is described in detail above.Specific case pair used herein
The principle of the present invention and embodiment are expounded, method of the invention that the above embodiments are only used to help understand
And its core concept.It should be pointed out that for those skilled in the art, before not departing from the principle of the invention
It puts, can be with several improvements and modifications are made to the present invention, these improvement and modification also fall into the guarantor of the claims in the present invention
It protects in range.
Claims (10)
1. a kind of electret microphone, including the elastic slice for being arranged between metal polar plate (103) and circuit board module (100)
(102), which is characterized in that the top of the elastic slice (102) is for supporting the circuit board module upwards under the effect of elasticity
(100) the first contact portion (1), the bottom of the elastic slice (102) are for supporting the metal pole downwards under the effect of elasticity
The first end of the second contact portion (2) of plate (103), the first end of first contact portion (1) and second contact portion (2) is logical
Interconnecting piece (3) to be crossed to be connected, the second end of the second end of first contact portion (1) and second contact portion (2) is free end,
In the operating condition, the contact point of first contact portion (1) and the circuit board module (100), second contact portion (2)
It is corresponded with the contact point of the metal polar plate (103) and the corresponding contact point is located on same vertical line.
2. electret microphone according to claim 1, which is characterized in that the second end of first contact portion (1) with
The second end of second contact portion (2) fits in the operating condition, and the middle part of first contact portion (1) is with convex
Structure, second contact portion (2) middle part have lower male structure.
3. electret microphone according to claim 2, which is characterized in that the second end of first contact portion (1) with
The second end of second contact portion (2) is corresponding in tabular and seamless applying.
4. electret microphone according to claim 2, which is characterized in that the elastic slice (102) has relative to level
Face symmetrical structure.
5. electret microphone according to claim 4, which is characterized in that first contact portion (1) is convex arch
Shape plate, second contact portion (2) arch sheet convex under being.
6. electret microphone according to claim 5, which is characterized in that the elastic slice (102) and the metal polar plate
(103) contact point between forms the contact point between straight line, the elastic slice (102) and the circuit board module (100)
It is formed on another straight line, two straight lines are corresponding and parallel up and down.
7. electret microphone according to claim 6, which is characterized in that the transverse projection of the arch sheet is circular arc line
Or the broken line at least one corner.
8. electret microphone according to claim 4, which is characterized in that first contact portion (1) and described second
The transverse projection of contact portion (2) is waveform line.
9. electret microphone according to claim 3, which is characterized in that the transverse projection of the interconnecting piece (3) is in U
Shape, two free ends of the interconnecting piece (3) be separately connected first contact portion (1) first end and second contact portion
(2) junction of first end, the interconnecting piece (3) and first contact portion (1), the interconnecting piece (3) and described second
The equal rounding off in junction of contact portion (2).
10. according to claim 1 to electret microphone described in 9 any one, which is characterized in that second contact portion
(1) connection for being supported between second contact portion (1) and the metal polar plate (103) and there is electric action is additionally provided on
Part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710790724.4A CN109429156B (en) | 2017-09-05 | 2017-09-05 | Electret microphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710790724.4A CN109429156B (en) | 2017-09-05 | 2017-09-05 | Electret microphone |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109429156A true CN109429156A (en) | 2019-03-05 |
| CN109429156B CN109429156B (en) | 2024-03-01 |
Family
ID=65513467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710790724.4A Active CN109429156B (en) | 2017-09-05 | 2017-09-05 | Electret microphone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109429156B (en) |
Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007036386A (en) * | 2005-07-22 | 2007-02-08 | Star Micronics Co Ltd | Method of manufacturing condenser microphone |
| CN200994101Y (en) * | 2006-12-26 | 2007-12-19 | 一诠精密工业股份有限公司 | Miniature vibration motor and its electrode spring strip |
| JP2008035159A (en) * | 2006-07-28 | 2008-02-14 | Star Micronics Co Ltd | Electret capacitor microphone |
| CN101257736A (en) * | 2008-03-01 | 2008-09-03 | 歌尔声学股份有限公司 | Miniature capacitor type microphone |
| CN201185478Y (en) * | 2008-03-01 | 2009-01-21 | 歌尔声学股份有限公司 | Miniature capacitor microphone |
| CN201307931Y (en) * | 2008-11-28 | 2009-09-09 | 歌尔声学股份有限公司 | Minisize capacitive microphone |
| CN201345735Y (en) * | 2009-01-10 | 2009-11-11 | 宁波鑫丰泰电器有限公司 | Microphone |
| CN201383872Y (en) * | 2009-01-19 | 2010-01-13 | 歌尔声学股份有限公司 | Separator of condenser microphone |
| CN201616904U (en) * | 2010-01-27 | 2010-10-27 | 潍坊新港电子有限公司 | Electret microphone |
| CN202424982U (en) * | 2012-01-13 | 2012-09-05 | 歌尔声学股份有限公司 | Microphone |
| CN102917302A (en) * | 2012-10-09 | 2013-02-06 | 深圳市豪恩声学股份有限公司 | Unidirectional electret microphone |
| CN102932718A (en) * | 2012-11-13 | 2013-02-13 | 山东共达电声股份有限公司 | Electret microphone picking up differential signals |
| CN203072150U (en) * | 2012-12-28 | 2013-07-17 | 东莞泉声电子有限公司 | Noise-reduction electret microphone |
| CN203193882U (en) * | 2013-02-20 | 2013-09-11 | 歌尔声学股份有限公司 | Electret condenser microphone |
| CN205491146U (en) * | 2016-01-11 | 2016-08-17 | 歌尔声学股份有限公司 | Dysmorphism shell fragment and electret microphone |
| CN207117947U (en) * | 2017-09-05 | 2018-03-16 | 山东共达电声股份有限公司 | Electret microphone |
-
2017
- 2017-09-05 CN CN201710790724.4A patent/CN109429156B/en active Active
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007036386A (en) * | 2005-07-22 | 2007-02-08 | Star Micronics Co Ltd | Method of manufacturing condenser microphone |
| JP2008035159A (en) * | 2006-07-28 | 2008-02-14 | Star Micronics Co Ltd | Electret capacitor microphone |
| CN200994101Y (en) * | 2006-12-26 | 2007-12-19 | 一诠精密工业股份有限公司 | Miniature vibration motor and its electrode spring strip |
| CN101257736A (en) * | 2008-03-01 | 2008-09-03 | 歌尔声学股份有限公司 | Miniature capacitor type microphone |
| CN201185478Y (en) * | 2008-03-01 | 2009-01-21 | 歌尔声学股份有限公司 | Miniature capacitor microphone |
| CN201307931Y (en) * | 2008-11-28 | 2009-09-09 | 歌尔声学股份有限公司 | Minisize capacitive microphone |
| CN201345735Y (en) * | 2009-01-10 | 2009-11-11 | 宁波鑫丰泰电器有限公司 | Microphone |
| CN201383872Y (en) * | 2009-01-19 | 2010-01-13 | 歌尔声学股份有限公司 | Separator of condenser microphone |
| CN201616904U (en) * | 2010-01-27 | 2010-10-27 | 潍坊新港电子有限公司 | Electret microphone |
| CN202424982U (en) * | 2012-01-13 | 2012-09-05 | 歌尔声学股份有限公司 | Microphone |
| CN102917302A (en) * | 2012-10-09 | 2013-02-06 | 深圳市豪恩声学股份有限公司 | Unidirectional electret microphone |
| CN102932718A (en) * | 2012-11-13 | 2013-02-13 | 山东共达电声股份有限公司 | Electret microphone picking up differential signals |
| CN203072150U (en) * | 2012-12-28 | 2013-07-17 | 东莞泉声电子有限公司 | Noise-reduction electret microphone |
| CN203193882U (en) * | 2013-02-20 | 2013-09-11 | 歌尔声学股份有限公司 | Electret condenser microphone |
| CN205491146U (en) * | 2016-01-11 | 2016-08-17 | 歌尔声学股份有限公司 | Dysmorphism shell fragment and electret microphone |
| CN207117947U (en) * | 2017-09-05 | 2018-03-16 | 山东共达电声股份有限公司 | Electret microphone |
Non-Patent Citations (3)
| Title |
|---|
| DMITRY RYCHKOV: "Unipolar ferroelectrets - Following the example of the electret microphone more closely", 《2014 IEEE CONFERENCE ON ELECTRICAL INSULATION AND DIELECTRIC PHENOMENA (CEIDP)》 * |
| 杨鑫峰: "驻极体单指向性传声器研究", 《电声技术》 * |
| 贺志坚: "驻极体电容振动拾音器（ECVP）", 《电声技术》, vol. 41, no. 3 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109429156B (en) | 2024-03-01 |
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