CN204616092U - A kind of electret microphone - Google Patents
A kind of electret microphone Download PDFInfo
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- CN204616092U CN204616092U CN201520306997.3U CN201520306997U CN204616092U CN 204616092 U CN204616092 U CN 204616092U CN 201520306997 U CN201520306997 U CN 201520306997U CN 204616092 U CN204616092 U CN 204616092U
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- capacitor
- pole plate
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- electret microphone
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- 239000003990 capacitor Substances 0.000 claims abstract description 36
- 239000004020 conductor Substances 0.000 claims abstract description 30
- 238000009434 installation Methods 0.000 claims description 3
- 239000012212 insulator Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 description 3
- 230000008054 signal transmission Effects 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
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- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Abstract
The utility model provides a kind of electret microphone, compared with traditional electret microphone, be provided with the first capacitor be made up of the first pole plate, the first pad and vibrating diaphragm, with the second capacitor be made up of the second pole plate, the second pad and vibrating diaphragm, first capacitor exports the signal of telecommunication to wiring board by the first conductor, second capacitor exports the signal of telecommunication to wiring board via the second conductor, and the signal of telecommunication that the first capacitor and the second capacitor export forms difference output.Two capacitance signal way of outputs of the utility model electret microphone are difference output, electret microphone is made to obtain higher signal to noise ratio, improve the ability suppressing linear distortion, the antijamming capability of microphone can be improved simultaneously, be more applicable to the long range propagation of signal.
Description
Technical field
The utility model belongs to acoustic-electric conversion art, and more specifically, the utility model relates to a kind of microphone, particularly relates to a kind of electret microphone.
Background technology
Electret microphone has the advantages that volume is little, structure is simple, electroacoustic performance is good, price is low, is widely used in mobile phone, wearable device, earphone, cassette recorder, wireless microphone and other consumable electronic products.Belong to the most frequently used Electret Condencer Microphone.
Along with the development in epoch, the progress of science and technology, the paces that various consumable electronic product updates are accelerated, corresponding more and more higher to the requirement of audio parts, for electret microphone field, the applied environment of microphone also becomes increasingly complex, and just needs microphone to have higher signal to noise ratio with this, less linear distortion and better antijamming capability.
Therefore be necessary that design one has high s/n ratio, low distortion, the microphone that antijamming capability is strong adapts to complicated applied environment and the technical requirement of Geng Gao.
Utility model content
The purpose of this utility model is to provide a kind of high s/n ratio, low distortion, the electret microphone that antijamming capability is strong.
For achieving the above object, the utility model is by the following technical solutions:
A kind of electret microphone, wherein: comprise shell and the cavity be arranged in described shell and wiring board, capacitance structure is provided with in described cavity, described capacitance structure comprises the first capacitor be made up of the first pole plate, the first pad and vibrating diaphragm, and the second capacitor be made up of the second pole plate, the second pad and vibrating diaphragm;
Described first pole plate of described first capacitor is electrically connected with described wiring board by the first conductor, and described second conductor that passes through of described second capacitor is electrically connected with described wiring board, and described vibrating diaphragm is electrically connected with shell by the 3rd conductor;
Insulator is provided with between described first pole plate and shell.
As the preferred technical scheme of one, wherein: described first conductor, described second conductor and described 3rd conductor are spring electric installation.
As the preferred technical scheme of one, wherein: on described shell, the position of corresponding first pole plate is provided with acoustic aperture.
As the preferred technical scheme of one, wherein: described first pole plate and described second pole plate are provided with through hole 4.
The utility model provides a kind of electret microphone, compared with traditional electret microphone, be provided with the first capacitor be made up of the first pole plate, the first pad and vibrating diaphragm, with the second capacitor be made up of the second pole plate, the second pad and vibrating diaphragm, first capacitor exports the signal of telecommunication to wiring board by the first conductor, second capacitor exports the signal of telecommunication to wiring board via the second conductor, and the signal of telecommunication that the first capacitor and the second capacitor export forms difference output.The mode of two electric capacity signal of telecommunication difference output of electret microphone of the present utility model can carry out phase compensation, electret microphone is made to obtain higher signal to noise ratio, improve the ability suppressing linear distortion, the antijamming capability of microphone can be improved simultaneously, make the distance of Signal transmissions longer, the audio performance of MIC is more excellent.
Accompanying drawing explanation
Accompanying drawing only for illustrating the object of preferred implementation, and does not think limitation of the present invention, and in whole accompanying drawing, represents identical parts by identical reference symbol.
Fig. 1 shows the structural representation of the utility model electret microphone embodiment.
Fig. 2 shows the structural representation of two electric capacity difference output of the utility model electret microphone
Embodiment
Various exemplary embodiment of the present invention is described in detail now with reference to accompanying drawing.It should be noted that: unless specifically stated otherwise, otherwise positioned opposite, the numerical expression of the parts of setting forth in these embodiments and step and numerical value do not limit the scope of the invention.
Illustrative to the description only actually of at least one exemplary embodiment below, never as any restriction to the present invention and application or use.
May not discuss in detail for the known technology of person of ordinary skill in the relevant, method and apparatus, but in the appropriate case, described technology, method and apparatus should be regarded as a part for specification.
In all examples with discussing shown here, any occurrence should be construed as merely exemplary, instead of as restriction.Therefore, other example of exemplary embodiment can have different values.
It should be noted that: represent similar terms in similar label and letter accompanying drawing below, therefore, once be defined in an a certain Xiang Yi accompanying drawing, then do not need to be further discussed it in accompanying drawing subsequently.
As shown in Figure 1, the utility model provides a kind of two capacitance difference fraction electret microphone, comprise shell 1 and the cavity 2 be arranged in described shell 1 and wiring board 3, capacitance structure is provided with in described cavity 2, described capacitance structure comprises the first capacitor be made up of the first pole plate 41, first pad 51 and vibrating diaphragm 6, and the second capacitor be made up of the second pole plate 42, second pad 52 and vibrating diaphragm 6; Described first capacitor and described second capacitor form two capacitance structures of microphone.First pole plate 41 of described first capacitor is electrically connected with described wiring board 3 by the first conductor 71, second pole plate 42 of described second capacitor is electrically connected with described wiring board 3 by the second conductor 72, and described vibrating diaphragm 6 is electrically connected with shell 1 by the 3rd conductor 73;
As depicted in figs. 1 and 2, described first capacitor exports the signal of telecommunication to wiring board 3 by the first conductor 71, and the second capacitor exports the signal of telecommunication to wiring board 3 via the second conductor 72, and the signal of telecommunication that the first capacitor and the second capacitor export forms difference output.The mode of two electric capacity difference output can improve the sensitivity of microphone, make electret microphone obtain higher signal to noise ratio, improve the ability of microphone suppression linear distortion, the antijamming capability of microphone can be improved simultaneously, make the distance of Signal transmissions longer, the audio performance of MIC is more excellent.
Electret microphone of the present utility model, is also provided with insulator 8 between the first pole plate 41 and shell 1, to be formed be electrically connected to avoid described first pole plate 41 with described shell 1.On described shell 1, the position of corresponding first pole plate 41 is provided with acoustic aperture 9 simultaneously, so that sound can enter microphone internal drive diaphragm oscillations from acoustic aperture 9, voice signal is converted into the signal of telecommunication by diaphragm oscillations.Wherein, described first pole plate and described second pole plate are provided with through hole 4, and this belongs to existing technology, no longer illustrates at this to one skilled in the art.
In practice process, described first conductor 71, described second conductor 72 and described 3rd conductor 73 are spring electric installation.First conductor and the second conductor and the 3rd conductor only play electrical connection effect, and the selection of conductor material does not affect the beneficial effect of the utility model electret microphone.
In sum, electret microphone of the present utility model, compared with traditional electret microphone, be provided with the first capacitor be made up of the first pole plate, the first pad and vibrating diaphragm, with the second capacitor be made up of the second pole plate, the second pad and vibrating diaphragm, first capacitor exports the signal of telecommunication to wiring board by the first conductor, and the second capacitor exports the signal of telecommunication to wiring board via the second conductor, and the signal of telecommunication that the first capacitor and the second capacitor export forms difference output.The mode of two electric capacity difference output can carry out phase compensation, electret microphone is made to obtain higher signal to noise ratio, improve the ability suppressing linear distortion, can improve the antijamming capability of microphone, make the distance of Signal transmissions longer, the audio performance of MIC is more excellent simultaneously.
Although be described in detail specific embodiments more of the present utility model by example, it should be appreciated by those skilled in the art, above example is only to be described, instead of in order to limit scope of the present utility model.It should be appreciated by those skilled in the art, when not departing from scope and spirit of the present utility model, above embodiment can be modified.Scope of the present utility model is limited by claims.
Claims (4)
1. an electret microphone, it is characterized in that: comprise shell (1) and the cavity (2) that is arranged in described shell (1) and wiring board (3), described cavity is provided with capacitance structure in (2), described capacitance structure comprises the first capacitor be made up of the first pole plate (41), the first pad (51) and vibrating diaphragm (6), and the second capacitor be made up of the second pole plate (42), the second pad (52) and vibrating diaphragm (6);
Described first pole plate (41) of described first capacitor is electrically connected with described wiring board (3) by the first conductor (71), described second pole plate (42) of described second capacitor is electrically connected with described wiring board (3) by the second conductor (72), and described vibrating diaphragm (6) is electrically connected with shell (1) by the 3rd conductor (73);
Insulator (8) is provided with between described first pole plate (41) and shell (1).
2. electret microphone according to claim 1, is characterized in that: described first conductor (71), described second conductor (72) and described 3rd conductor (73) are spring electric installation.
3. electret microphone according to claim 1, is characterized in that: the position of upper corresponding first pole plate (41) of described shell (1) is provided with acoustic aperture (9).
4. electret microphone according to claim 1, is characterized in that: described first pole plate (41) and described second pole plate (42) are provided with through hole (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520306997.3U CN204616092U (en) | 2015-05-13 | 2015-05-13 | A kind of electret microphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520306997.3U CN204616092U (en) | 2015-05-13 | 2015-05-13 | A kind of electret microphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204616092U true CN204616092U (en) | 2015-09-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520306997.3U Active CN204616092U (en) | 2015-05-13 | 2015-05-13 | A kind of electret microphone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204616092U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106658248A (en) * | 2017-01-06 | 2017-05-10 | 北京博实联创科技有限公司 | Condenser microphone with mutually switched bi-directional and non-directional functions and electronic device |
| WO2021134202A1 (en) * | 2019-12-30 | 2021-07-08 | 瑞声声学科技(深圳)有限公司 | Bone conduction microphone |
-
2015
- 2015-05-13 CN CN201520306997.3U patent/CN204616092U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106658248A (en) * | 2017-01-06 | 2017-05-10 | 北京博实联创科技有限公司 | Condenser microphone with mutually switched bi-directional and non-directional functions and electronic device |
| CN106658248B (en) * | 2017-01-06 | 2019-01-18 | 北京博实联创科技有限公司 | The Electret Condencer Microphone and electronic equipment of double directing property and non-directive exchange function |
| WO2021134202A1 (en) * | 2019-12-30 | 2021-07-08 | 瑞声声学科技(深圳)有限公司 | Bone conduction microphone |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 261031 Dongfang Road, Weifang high tech Industrial Development Zone, Shandong, China, No. 268 Patentee after: Goertek Inc. Address before: 261031 Dongfang Road, Weifang high tech Industrial Development Zone, Shandong, China, No. 268 Patentee before: Goertek Inc. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200615 Address after: 266104 room 103, 396 Songling Road, Laoshan District, Qingdao, Shandong Province Patentee after: Goer Microelectronics Co.,Ltd. Address before: 261031 Dongfang Road, Weifang high tech Industrial Development Zone, Shandong, China, No. 268 Patentee before: GOERTEK Inc. |