CN204681587U - Electret microphone - Google Patents

Electret microphone Download PDF

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Publication number
CN204681587U
CN204681587U CN201520490307.4U CN201520490307U CN204681587U CN 204681587 U CN204681587 U CN 204681587U CN 201520490307 U CN201520490307 U CN 201520490307U CN 204681587 U CN204681587 U CN 204681587U
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China
Prior art keywords
diaphragm
primary diaphragm
electret microphone
motion
electret
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Active
Application number
CN201520490307.4U
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Chinese (zh)
Inventor
T·米勒
D·瓦恩
T·威克斯特龙
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Knowles Electronics LLC
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Knowles Electronics LLC
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Abstract

Electret microphone.A kind of electret microphone, comprising: housing, it forms inner space.Housing has the port extending through housing.Microphone also comprises primary diaphragm and secondary diaphragm; Be arranged on the backboard on primary diaphragm.This backboard has permanently-polarised electret layer.Inner space is divided into back space and front space by primary diaphragm and secondary diaphragm.Acoustic energy is moved by port, makes primary diaphragm carry out the first motion thus produces the signal of telecommunication, and acoustic energy also produces the second motion of secondary diaphragm, and the second motion effectively can reduce the sensitivity of primary diaphragm.

Description

Electret microphone
Technical field
The application relates to electret (electret) microphone, relates more specifically to the operation of this kind of device.
Background technology
Employ dissimilar acoustic apparatus for many years.The device of one type is microphone.Microphone applications in various types of device, such as PC or cell phone.The device of one type is electret microphone, and its dorsulum is charged.Diaphragm moves along with the sound entered, and along with the diaphragm of backboard motion produce the signal of telecommunication.
Microphone has response curve, the output over a frequency range of this response curve definition microphone.If this response curve does not have suitable shape, then can cause distortion to entering signal.Distortion is by the sound making audience distinguish to enter or make this process very difficult.
The problem of existing program has caused user to be discontented with some of these existing programs.
Utility model content
The utility model provides a kind of electret microphone, and this electret microphone comprises: housing, and it forms inner space, and this housing has the port extending through this housing; Primary diaphragm and secondary diaphragm; Be arranged on the backboard above primary diaphragm, this backboard has permanently-polarised electret layer; Wherein, described inner space is divided into back space and front space by described primary diaphragm and described secondary diaphragm; Wherein, acoustic energy is moved by port, makes described primary diaphragm carry out the first motion thus produces the signal of telecommunication, and this acoustic energy produces the second motion of described secondary diaphragm, and this second motion effectively reduces the sensitivity of described primary diaphragm.
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 the various execution mode of the utility model;
Fig. 2 comprises the end view of the electret microphone according to the various execution mode of the utility model;
Fig. 3 comprises the end view of the electret microphone according to the various execution mode of the utility model;
Fig. 4 comprise Fig. 1 according to the various execution mode of the utility model, 2 and 3 the figure of response curve of electret microphone.
Those skilled in the art it will be appreciated that, illustrate that the element in figure 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 it will be appreciated by those skilled in the art that, in fact this particularity of appearance order be not necessary.It is to be further understood that used term and expression have common implication here, this kind of term in the corresponding field investigated separately to them and study and expresses unanimously, unless this gived particular meaning.
Embodiment
Process provides a kind of electret microphone with ski slope response.The response of ski slope allows audience correctly to distinguish the audio signal with minimum (or not having) distortion.More specifically, respond by utilizing in microphone two diaphragms to obtain ski slope and use the motion of secondary diaphragm to reduce the sensitivity of primary diaphragm.
Referring now to Fig. 1-Fig. 3, electret microphone 100 comprises housing 102 (forming internal capacity or space 104).Housing 102 has the port one 06 extending through housing.Microphone 100 also comprises primary diaphragm 108 and backboard 107.Backboard 107 is arranged on above primary diaphragm 108.Electret only should, near diaphragm 108, make the motion of diaphragm 109 to produce the signal of telecommunication.Backboard 107 has permanently-polarised electret layer.Inner space 108 is divided into back space 110 and front space 112 by primary diaphragm 108 and secondary diaphragm 109.
Acoustic energy 101 is moved by port one 06 and causes primary diaphragm 108 to carry out the first motion thus create the signal of telecommunication, and acoustic energy 101 also creates the second motion of secondary diaphragm 109, and this second motion effectively reduces the sensitivity of primary diaphragm 108." sensitivity " refers to the voltage of generation and the ratio (such as, volt/Pascal) of sound pressure level.
As Fig. 2, in one example, be arranged side by side primary diaphragm 108 and secondary diaphragm 109 level with one another.
As Fig. 3, in another example, primary diaphragm 108 is vertical with secondary diaphragm 109 stacked on top to be arranged.
In other side, backboard 107 comprises or comprises opening.The object of this opening allows the air of constraint between backboard 107 and primary diaphragm 108 more freely to leave, thus improve the sensitivity at high frequency of microphone.In other example, secondary diaphragm is constructed by polyester film (Mylar).Other example of material is also possible.
Referring now to Fig. 4, describe an example of the response curve 400 of the electret microphone 100 of Fig. 1-Fig. 3.Y-axis is response, and x-axis is frequency.Can find out, the bottom 402 of curve 400 is not substantially with frequency change and this part 402 is called as ski slope.
There has been described preferred implementation of the present utility model, comprise 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 regarded as the restriction to the utility model scope.

Claims (5)

1. an electret microphone, this electret microphone comprises:
Housing, it forms inner space, and this housing has the port extending through this housing;
Primary diaphragm and secondary diaphragm;
Be arranged on the backboard above primary diaphragm, this backboard has permanently-polarised electret layer;
Wherein, described inner space is divided into back space and front space by described primary diaphragm and described secondary diaphragm;
Wherein, acoustic energy is moved by port, makes described primary diaphragm carry out the first motion thus produces the signal of telecommunication, and this acoustic energy produces the second motion of described secondary diaphragm, and this second motion effectively reduces the sensitivity of described primary diaphragm.
2. electret microphone as claimed in claim 1, is characterized in that, is arranged side by side described primary diaphragm and described secondary diaphragm level with one another.
3. electret microphone as claimed in claim 1, it is characterized in that, described primary diaphragm and described secondary diaphragm are vertically arranged up and down.
4. electret microphone as claimed in claim 1, it is characterized in that, described backboard comprises opening.
5. electret microphone as claimed in claim 1, it is characterized in that, described secondary diaphragm polyester film constructs.
CN201520490307.4U 2014-12-17 2015-05-05 Electret microphone Active CN204681587U (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201462092964P 2014-12-17 2014-12-17
US62/092,964 2014-12-17

Publications (1)

Publication Number Publication Date
CN204681587U true CN204681587U (en) 2015-09-30

Family

ID=54181253

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201520490307.4U Active CN204681587U (en) 2014-12-17 2015-05-05 Electret microphone

Country Status (1)

Country Link
CN (1) CN204681587U (en)

Cited By (4)

* Cited by examiner, † Cited by third party
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

Cited By (5)

* Cited by examiner, † Cited by third party
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

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