CN202679625U - Capacitance microphone - Google Patents
Capacitance microphone Download PDFInfo
- Publication number
- CN202679625U CN202679625U CN 201220258618 CN201220258618U CN202679625U CN 202679625 U CN202679625 U CN 202679625U CN 201220258618 CN201220258618 CN 201220258618 CN 201220258618 U CN201220258618 U CN 201220258618U CN 202679625 U CN202679625 U CN 202679625U
- Authority
- CN
- China
- Prior art keywords
- back plate
- plate aperture
- capacitance microphone
- aperture group
- hole group
- 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.)
- Expired - Fee Related
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Abstract
Disclosed is a capacitance microphone, comprising a back-pole plate provided with a plurality of back plate holes, wherein the back plate holes comprise a first back plate hole group located at the intermediate area of the back-pole plate and a second back plate hole group surrounding the first back plate hole group; and the perforating density of the first back plate hole group is smaller than that of the second back plate hole group. Compared to the prior art, the capacitance microphone of the utility model is characterized in that: the area at the intermediate area of the back-pole plate right opposite to the capacitance microphone diaphragm is increased, thereby effectively raising the sensitivity and the signal to noise ratio.
Description
[technical field]
The utility model relates to a kind of capacitance microphone.
[background technology]
Mobile communication technology is rapidly developed in recent years, the consumer uses mobile communication equipment more and more, and for example portable phone, the portable phone that can surf the Net, personal digital assistant, laptop computer, laptop computer, figure input card maybe can be by other equipment public or that dedicated communications network communicates.The technological progress of the expansion at honeycomb networking and mobile communication aspect makes more consumers use mobile communication equipment.
The consumer not only is satisfied with and can converses the requirement of mobile communication equipment, and want to provide high-quality communication effect, especially the development of Technology of Mobile Multimedia, the speech quality of mobile phone becomes more important, the microphone of mobile phone is as the voice device of mobile phone, its design quality directly affects speech quality, so the performance quality of microphone is very large on the impact of mobile phone.On the back pole plate of microphone, how to open the performance that back plate aperture affects again microphone.In the correlation technique, as shown in fig. 1, evenly offer a large amount of back plate apertures on the back pole plate, back plate aperture has reduced noise and has optimized damping but a large amount of back plate apertures has caused the sensitivity of capacitance microphone to descend.
Therefore, be necessary to provide a kind of new technical scheme to overcome defects in fact.
[utility model content]
It is good that the purpose of this utility model provides a kind of sensitivity, the capacitance microphone that signal to noise ratio is high.
The purpose of this utility model is achieved in that
A kind of capacitance microphone, it comprises the back pole plate that offers some back plate apertures, described back plate aperture comprises the first back plate aperture group who is positioned at described back pole plate zone line and the second back plate aperture group who surrounds described the first back plate aperture group, and described the first back plate aperture group's perforate density is less than described the second back plate aperture group's perforate density.
Preferably, described the first back plate aperture group's back plate aperture forms some hexagonal cells.
Preferably, described the first back plate aperture group is regular hexagon.
The utlity model has following advantage: capacitance microphone of the present utility model is compared to the capacitance microphone of correlation technique, and the back pole plate zone line has increased over against the area of capacitance microphone vibrating diaphragm, Effective Raise sensitivity and signal to noise ratio.
[description of drawings]
Fig. 1 is the mode that correlation technique dorsulum hole distributes at back pole plate;
Fig. 2 is the mode that embodiment dorsulum hole that the utility model provides distributes at back pole plate.
[embodiment]
Below in conjunction with accompanying drawing, the utility model is elaborated.
As shown in Figure 2, the capacitance microphone that the utility model provides (not shown), comprise the back pole plate 100 that offers some back plate apertures, described back plate aperture comprises the first back plate aperture group 1 who is positioned at back pole plate 100 zone lines and the second back plate aperture group 2 who surrounds described the first back plate aperture group 1, described the first back plate aperture group's 1 perforate density is less than described the second back plate aperture group's 2 perforate density, and so-called perforate density refers to that the area in described back plate aperture group dorsulum hole accounts for the percentage of whole back plate aperture group's area.
Compared to correlation technique dorsulum hole equally distributed mode on back pole plate, reduce the perforate density that the back pole plate zone line is offered back plate aperture, increased the area of back pole plate zone line over against the capacitance microphone vibrating diaphragm.
Described the first back plate aperture group's 1 back plate aperture forms some hexagonal cells 3, and described some hexagonal cells 3 can be regular hexagons.Described the first back plate aperture group 1 is regular hexagon.
The shape of back plate aperture is not limited to the circular port shape among Fig. 2, also can adopt square opening etc., and the shape of same back pole plate also is not limited to circular back pole plate among Fig. 2, also can adopt other shapes, such as square.
Capacitance microphone of the present utility model is compared to the capacitance microphone of correlation technique, and the back pole plate zone line has increased over against the area of capacitance microphone vibrating diaphragm, Effective Raise sensitivity and signal to noise ratio.
Above-described only is execution mode of the present utility model; should be pointed out that for the person of ordinary skill of the art at this, under the prerequisite that does not break away from the utility model creation design; can also make improvement, but these all belong to protection range of the present utility model.
Claims (3)
1. capacitance microphone, it comprises the back pole plate that offers some back plate apertures, it is characterized in that: described back plate aperture comprises the first back plate aperture group who is positioned at described back pole plate zone line and the second back plate aperture group who surrounds described the first back plate aperture group, and described the first back plate aperture group's perforate density is less than described the second back plate aperture group's perforate density.
2. capacitance microphone according to claim 1, it is characterized in that: described the first back plate aperture group's back plate aperture forms some hexagonal cells.
3. capacitance microphone according to claim 2, it is characterized in that: described the first back plate aperture group is regular hexagon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220258618 CN202679625U (en) | 2012-06-04 | 2012-06-04 | Capacitance microphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220258618 CN202679625U (en) | 2012-06-04 | 2012-06-04 | Capacitance microphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202679625U true CN202679625U (en) | 2013-01-16 |
Family
ID=47500494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220258618 Expired - Fee Related CN202679625U (en) | 2012-06-04 | 2012-06-04 | Capacitance microphone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202679625U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018002595A1 (en) * | 2016-06-30 | 2018-01-04 | Cirrus Logic International Semiconductor Limited | Mems device and process |
-
2012
- 2012-06-04 CN CN 201220258618 patent/CN202679625U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018002595A1 (en) * | 2016-06-30 | 2018-01-04 | Cirrus Logic International Semiconductor Limited | Mems device and process |
| CN109417672A (en) * | 2016-06-30 | 2019-03-01 | 思睿逻辑国际半导体有限公司 | MEMS device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170525 Address after: Singapore Ang Mo Kio 65 Street No. 10 techpoint Building 1 floor, No. 8 Co-patentee after: AAC Acoustic Technologies (Changzhou) Co., Ltd. Patentee after: AAC Technologies (Singapore) Co., Ltd. Address before: 518057 Nanshan District hi tech Industrial Park, Shenzhen, North West New West Road, No. Rui sound technology building, No. 18 Co-patentee before: AAC Technologies (Singapore) Co., Ltd. Patentee before: AAC Acoustic Technologies (Shenzhen) Co., Ltd. Co-patentee before: AAC Acoustic Technologies (Changzhou) Co., Ltd. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130116 Termination date: 20210604 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |