CN204681593U - Electret microphone - Google Patents
Electret microphone Download PDFInfo
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- CN204681593U CN204681593U CN201520474704.2U CN201520474704U CN204681593U CN 204681593 U CN204681593 U CN 204681593U CN 201520474704 U CN201520474704 U CN 201520474704U CN 204681593 U CN204681593 U CN 204681593U
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- space
- electret microphone
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- diaphragm
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Abstract
The utility model relates to a kind of electret microphone, and this electret microphone comprises: diaphragm; Backboard, described backboard comprises permanently-polarised electret layer; And shell, described shell is formed with inner space.Described diaphragm is placed in the enclosure thus described inner space is separated into front space and back space.Port extends through shell and enters front space to allow acoustic energy.Opening allows front space to communicate with between back space.Described opening also allows acoustic energy to exchange between front space and back space.The size of described opening is set to make acoustic energy lower than during 200Hz produce first change.
Description
Technical field
The utility model relates to a kind of electret microphone, relates more specifically to the operation of these equipment.
Background technology
Existing dissimilar acoustic equipment is put into use for many years.One kind equipment is microphone.Microphone applications in various types of equipment, such as PC or mobile phone.One kind equipment is electret microphone, and its backboard is charged.Diaphragm along with input sound move, and along with the diaphragm of this backboard motion produce the signal of telecommunication.
Microphone has the response curve limiting the output of microphone in a frequency range.If this response curve is not by suitable shaping, may there is distortion in input signal.Distortion cannot be distinguished the sound of input by making audience or make this process very difficult.
Existing this problem methodical has caused user existing methodical discontented to these.
Utility model content
According to first aspect of the present utility model, provide a kind of electret microphone, described electret microphone comprises:
Diaphragm;
Backboard, described backboard comprises permanently-polarised electret layer;
Shell, described shell is formed with inner space;
Wherein, described diaphragm to be placed in described shell thus described inner space is separated into front space and back space;
Port, this port extends through described shell and enters described front space to allow acoustic energy;
Opening, described opening allows to communicate between described front space with described back space, and described opening allows acoustic energy to exchange between described front space and described back space;
The size of described opening is configured to make acoustic energy changing lower than producing first during 200Hz.
In second aspect of the present utility model, according to first aspect of the present utility model, described first change is decay.
In the third aspect of the present utility model, according to first aspect of the present utility model, described opening extends through diaphragm.
In fourth aspect of the present utility model, according to first aspect of the present utility model, described opening is of a size of 0.06mm
2.
In in the of the present utility model 5th, according to first aspect of the present utility model, form a paths from described port to described opening and described path has and is enough to make described acoustic energy to produce the second size changed.
In in 6th of the present utility model, according to the 5th aspect of the present utility model, the line extended between described port and described opening has the first length, and described path has the second length being greater than described first length.
In in the of the present utility model 7th, according to the 6th aspect of the present utility model, described path is formed by U-shaped portion part at least partly, and described U-shaped portion part is placed in described front space between described diaphragm and shell.
Accompanying drawing explanation
In order to more completely understand the disclosure, should with reference to following the detailed description and the accompanying drawings, wherein:
Fig. 1 comprises the stereogram of the electret microphone according to various execution mode of the present utility model;
Fig. 2 is included in the sectional axonometric drawing according to the electret microphone in Fig. 1 of various execution mode of the present utility model;
Fig. 3 is included in the end view along A-A line according to the electret microphone in Fig. 1 and Fig. 2 of various execution mode of the present utility model;
Fig. 4 is included in the diagram of the response curve according to Fig. 1 of various execution mode of the present utility model, the electret microphone of 2 and 3.
Embodiment
Those skilled in the art it will be understood that the element in shown accompanying drawing is in order to simple and clear.To will be further appreciated that some action and/or step may be described or be depicted as to occur with particular order, and those skilled in the art will appreciate that in fact this particularity of appearance order be not necessary.It is to be further understood that used term and statement have common implication here, this kind of term in the corresponding field investigated separately to them and study and state unanimously, unless provided particular meaning here.
Process provides a kind of electret microphone with ski slope response.Ski slope response allows audience correctly to distinguish audio signal with minimum (or nothing) distortion.Ski slope response forms comparatively big uncork by front space in a device and back space and obtains.In another example, between opening and microphone port, form zigzag path so that assisted Extraction is for ski slope response.
With reference now to Fig. 1 to Fig. 3, describe an example of electret microphone 100.Electret microphone 100 comprises diaphragm 102, backboard 104 and shell 106.
Backboard 104 comprises permanently-polarised electret layer.Shell 106 is formed with inner space 110.
Diaphragm 102 is placed in shell 106, thus inner space 110 is separated into front space 112 and back space 114.Port one 16 extends through shell 106, and allows acoustic energy 101 to enter front space 112.Diaphragm 102 is kept by diaphragm ring 103.Backboard 104 is connected to ring 103 by epoxy resin 105.
Opening 118 allows to communicate between front space 112 with back space 114.Opening 118 allows acoustic energy to exchange between front space 112 and back space 114.Opening 118 is sized to and makes to produce the first change at acoustic energy lower than acoustic energy during 200Hz.Other embodiments are also feasible.
In some aspects, this first change is decay.In other embodiments, opening 118 extends through diaphragm 102.In other side, opening 118 is of a size of 0.06mm
2.
In other embodiments, from port one 16 to opening 118 pathway 107 and the size in path 107 is enough to make acoustic energy to produce second changes.In certain embodiments, the line 130 extended between port one 16 and opening 118 has the first length, and described path has the second length being greater than this first length.In other side, path 107 is formed by U-shaped portion part 109 at least in part.U-shaped portion part 109 is placed in front space 112 between diaphragm 102 and shell 106.
Referring now to Fig. 4, describe an embodiment of the response curve 400 of the electret microphone 100 of Fig. 1 to Fig. 3.Y-axis is response, and x-axis is frequency.Can find out, the bottom 402 of curve 400 is linear, and this part 402 is called as ski slope.
There has been described preferred implementation of the present utility model, this comprises enforcement known for inventor optimal mode of the present utility model.Should be understood that, shown execution mode is only exemplary, and should not be considered to be the restriction to the utility model scope.
Claims (7)
1. an electret microphone, is characterized in that, described electret microphone comprises:
Diaphragm;
Backboard, described backboard comprises permanently-polarised electret layer;
Shell, described shell is formed with inner space;
Wherein, described diaphragm to be placed in described shell thus described inner space is separated into front space and back space;
Port, this port extends through described shell and enters described front space to allow acoustic energy;
Opening, described opening allows to communicate between described front space with described back space, and described opening allows acoustic energy to exchange between described front space and described back space;
The size of described opening is configured to make acoustic energy changing lower than producing first during 200Hz.
2. electret microphone according to claim 1, is characterized in that, described first change is decay.
3. electret microphone according to claim 1, is characterized in that, described opening extends through described diaphragm.
4. electret microphone according to claim 1, is characterized in that, described opening is of a size of 0.06mm
2.
5. electret microphone according to claim 1, is characterized in that, forms a paths and described path has and is enough to make described acoustic energy to produce the second size changed from described port to described opening.
6. electret microphone according to claim 5, is characterized in that, the line extended between described port and described opening has the first length, and described path has the second length being greater than described first length.
7. electret microphone according to claim 6, is characterized in that, described path is formed by U-shaped portion part at least partly, and described U-shaped portion part is placed in described front space between described diaphragm and shell.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201462092939P | 2014-12-17 | 2014-12-17 | |
| US62/092,939 | 2014-12-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204681593U true CN204681593U (en) | 2015-09-30 |
Family
ID=54181259
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520474704.2U Active CN204681593U (en) | 2014-12-17 | 2015-05-05 | Electret microphone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204681593U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9401158B1 (en) | 2015-09-14 | 2016-07-26 | Knowles Electronics, Llc | Microphone signal fusion |
| US9779716B2 (en) | 2015-12-30 | 2017-10-03 | Knowles Electronics, Llc | Occlusion reduction and active noise reduction based on seal quality |
| US9812149B2 (en) | 2016-01-28 | 2017-11-07 | Knowles Electronics, Llc | Methods and systems for providing consistency in noise reduction during speech and non-speech periods |
| US9830930B2 (en) | 2015-12-30 | 2017-11-28 | Knowles Electronics, Llc | Voice-enhanced awareness mode |
| WO2018213781A1 (en) * | 2017-05-18 | 2018-11-22 | The Johns Hopkins University | Push-pull electret transducer with controlled restoring force for low frequency microphones and energy harvesting |
-
2015
- 2015-05-05 CN CN201520474704.2U patent/CN204681593U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9401158B1 (en) | 2015-09-14 | 2016-07-26 | Knowles Electronics, Llc | Microphone signal fusion |
| US9961443B2 (en) | 2015-09-14 | 2018-05-01 | Knowles Electronics, Llc | Microphone signal fusion |
| US9779716B2 (en) | 2015-12-30 | 2017-10-03 | Knowles Electronics, Llc | Occlusion reduction and active noise reduction based on seal quality |
| US9830930B2 (en) | 2015-12-30 | 2017-11-28 | Knowles Electronics, Llc | Voice-enhanced awareness mode |
| US9812149B2 (en) | 2016-01-28 | 2017-11-07 | Knowles Electronics, Llc | Methods and systems for providing consistency in noise reduction during speech and non-speech periods |
| WO2018213781A1 (en) * | 2017-05-18 | 2018-11-22 | The Johns Hopkins University | Push-pull electret transducer with controlled restoring force for low frequency microphones and energy harvesting |
| US11228844B2 (en) | 2017-05-18 | 2022-01-18 | The Johns Hopkins University | Push-pull electret transducer with controlled restoring force for low frequency microphones and energy harvesting |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |