CN108200519A - A kind of microphone and promotion overload acoustic pressure method - Google Patents
A kind of microphone and promotion overload acoustic pressure method Download PDFInfo
- Publication number
- CN108200519A CN108200519A CN201711450441.1A CN201711450441A CN108200519A CN 108200519 A CN108200519 A CN 108200519A CN 201711450441 A CN201711450441 A CN 201711450441A CN 108200519 A CN108200519 A CN 108200519A
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- signal
- threshold
- microphone
- threshold signal
- acquisition
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2430/00—Signal processing covered by H04R, not provided for in its groups
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
The present invention discloses a kind of microphone, including acquisition module, detects ambient pressure, forms acquisition signal output；Control module is preset with threshold signal, forms first control signal according to acquisition signal and threshold signal and second control signal exports；Pumping source is electrically connected with capacitor, and the driving voltage to capacitor of pumping source is reduced according to first control signal；It can also include amplifier, be electrically connected with capacitor, the output voltage amplification factor to capacitor is reduced according to second control signal.By the effect of pumping source and amplifier, microphone overload acoustic pressure performance is promoted, microphone is made to enter high sound pressure protected mode.The invention also discloses a kind of promotions based on microphone to overload acoustic pressure method.The present invention can promote the high sound pressure tolerance of microphone products, so as to which the voice signal picked up be avoided to be distorted when user is higher using the acoustic pressure of microphone.
Description
Technical field
The present invention relates to sound signal processing technical fields, more particularly, to a kind of microphone and promote overload acoustic pressure
Method.
Background technology
When user is using microphone, song is excessive, voice is excessively high, when causing acoustic pressure higher, such as the sound of more than 130dBSPL
Pressure, the microphone signal voltage being exaggerated has exceeded the best effort range of sound treatment circuit, so as to cause the sound picked up
Sound signal is distorted, and microphone property reduces.
Accordingly, it is desirable to provide a kind of microphone and promotion overload acoustic pressure method.
Invention content
It is an object of the present invention to provide a kind of microphones.
It is another object of the present invention to provide a kind of promotions based on microphone to overload acoustic pressure method.
In order to achieve the above objectives, the present invention uses following technical proposals：
A kind of microphone, including capacitor, including
Acquisition module detects ambient pressure, forms acquisition signal output；
Control module is preset with threshold signal, and forming the first control according to the acquisition signal and the threshold signal believes
Number output；
Pumping source is electrically connected with the capacitor, and the driving voltage to capacitor is reduced according to first control signal.
Preferably, the threshold signal includes first threshold signal and second threshold signal, in the change of the acquisition signal
Change and be more than first threshold signal, and the variation of the acquisition signal is more than second threshold more than the duration of first threshold signal
In the state of signal, the control module exports first control signal.
Preferably, the microphone further comprises the amplifier being electrically connected with the capacitor；
The control module further forms second control signal output according to the acquisition signal and the threshold signal；
The amplifier reduces the output voltage amplification factor to capacitor according to second control signal.
Preferably, the threshold signal includes first threshold signal and second threshold signal, in the change of the acquisition signal
Change and be more than first threshold signal, and the variation of the acquisition signal is more than second threshold more than the duration of first threshold signal
In the state of signal, the control module exports second control signal.
Preferably, the microphone further comprises the setting module being connect with control module, the setting module according to
Receive the threshold signal in the input setting control module of user.
A kind of promotion overload acoustic pressure method based on microphone, including
S1. the air pressure of microphone local environment is detected, forms acquisition signal output；
S2. preset threshold signal is combined according to the acquisition signal and forms first control signal output；
S3. the driving voltage to capacitor of pumping source is reduced according to first control signal.
Preferably, the step S2 is specifically included
S2.1. the threshold signal is preset, the threshold signal includes first threshold signal and second threshold signal；
S2.2. it is more than first threshold signal in the variation of the acquisition signal and acquires the variation of signal simultaneously more than the first threshold
The duration of value signal is more than in the state of second threshold signal, forms first control signal and/or second control signal is defeated
Go out.
Preferably, the method further includes
S2. preset threshold signal formation first control signal is combined according to the acquisition signal and second control signal is defeated
Go out；
S3. the driving voltage to capacitor of pumping source is reduced according to first control signal, is dropped according to second control signal
Low amplifier is to the output voltage amplification factor of capacitor.
Preferably, the step S2 is specifically included
S2.1. the threshold signal is preset, the threshold signal includes first threshold signal and second threshold signal；
S2.2. it is more than first threshold signal in the variation of the acquisition signal and acquires the variation of signal simultaneously more than the first threshold
The duration of value signal is more than in the state of second threshold signal, forms first control signal and second control signal output.
Preferably, the threshold signal is inputted according to user and is set.
Beneficial effects of the present invention are as follows：
When microphone pickup input encounters the acoustic pressure changed greatly, by the excitation electricity to capacitor for reducing pumping source
So as to avoid pickup audio distortions, wheat is substantially improved in the output voltage amplification factor to capacitor of pressure and/or step-down amplifier
The acoustic pressure tolerance of gram wind product, improves the sound quality of microphone output, while adapts to specific microphone usage scenario.
Description of the drawings
The specific embodiment of the present invention is described in further detail below in conjunction with the accompanying drawings.
Fig. 1 shows to promote the microphone structure figure of overload acoustic pressure.
Fig. 2 shows the flow charts of the promotion overload acoustic pressure method based on microphone.
Fig. 3 shows the air pressure schematic diagram that acquisition module detects.
Specific embodiment
In order to illustrate more clearly of the present invention, the present invention is done further with reference to preferred embodiments and drawings
It is bright.Similar component is indicated with identical reference numeral in attached drawing.It will be appreciated by those skilled in the art that institute is specific below
The content of description is illustrative and be not restrictive, and should not be limited the scope of the invention with this.
In description given below, for purposes of illustration, in order to provide comprehensive reason to one or more embodiment
Solution, numerous specific details are set forth.It may be evident, however, that these realities can also be realized without these specific details
Apply mode.In other examples, one or more embodiment for ease of description, well known structure and equipment are with block diagram
Form show.
In order to illustrate more clearly of the present invention, the present invention is done further with reference to preferred embodiments and drawings
It is bright.Similar component is indicated with identical reference numeral in attached drawing.It will be appreciated by those skilled in the art that institute is specific below
The content of description is illustrative and be not restrictive, and should not be limited the scope of the invention with this.
" first " and " second " in the description of following embodiments, effect that there is no restriction, only for used in description, no
It should be limited the scope of the invention with this.
An embodiment provides a kind of microphone, as shown in Figure 1, the microphone includes capacitor, acquisition
Module, control module and pumping source can also further include amplifier, can also include setting module.
Acquisition module is provided with baroceptor, detects air pressure, forms acquisition signal output.Acquisition signal is microphone
Air pressure in local environment.
Control module is preset with threshold signal, receives acquisition signal, and form first according to acquisition signal and threshold signal
Signal output is controlled, can also further form second control signal output.
Setting module is connect with control module, for inputting the threshold signal by setting control module according to user, from
And adapt to the demand of different acoustic pressure occasions.Setting module can be plectrum, knob or electronic curtain, only point out several representatives here
Property example.
Threshold signal includes first threshold signal and second threshold signal.First threshold signal is (right for 50PA air pressure changes
Answer the acoustic pressure of 130dBSPL), second threshold signal is the 1S duration.First threshold signal and second threshold in the present embodiment
The concrete numerical value of signal can input according to user and preset, only point out a kind of representative example here.Control module is in acquisition signal
Variation be more than first threshold signal, i.e. air pressure change is more than in the state of 50PA, meanwhile, be more than the in the variation of acquisition signal
The duration of one threshold signal is more than second threshold signal, i.e. the duration is more than in the state of 1S, judges residing for microphone
Environment is high sound pressure, forms first control signal, can also further form second control signal output.
First control signal is to reduce signal of the pumping source to the driving voltage of capacitor, and second control signal is to reduce
Amplifier is to the signal of the output voltage amplification factor of capacitor.Equally there may also be other to control signal, is carried as long as playing
Microphone overload acoustic pressure effect is risen, two kinds of control signals in the present embodiment are not intended to limit control signal form, here only
Point out several representative examples.
The element of microphone, such as the pumping source in the present embodiment, there are being acted on during first control signal or amplifier,
There are being acted on during second control signal, so as to promote microphone overload acoustic pressure performance, microphone is made to enter high sound pressure protection mould
Formula is not acted in no control signal, so as to restore microphone overload acoustic pressure performance, microphone is made to exit high sound pressure protection mould
Formula.
Pumping source is electrically connected with power supply, capacitor, receives power input, and then to capacitor output drive voltage.The pump
Power supply receives first control signal, and the driving voltage to capacitor is reduced according to first control signal.
Amplifier is electrically connected as output port with ground wire, capacitor.The amplifier receives second control signal, according to
Second control signal reduces the output voltage amplification factor to capacitor.
In the present embodiment, microphone overload acoustic pressure performance is promoted, microphone is made to enter the means packet of high sound pressure protected mode
The driving voltage to capacitor by pumping source reduction is included, the output voltage amplification factor to capacitor is reduced by amplifier,
Reduce pumping source by pumping source reduces by amplifier to capacitor the driving voltage to capacitor of capacitor simultaneously
Output voltage amplification factor only points out several representative examples here.Those of ordinary skill in the art, equally can basis
The present invention promotes microphone overload acoustic pressure performance by the effect of other elements.
Reduction amplitude depends on the air pressure change amplitude size in acquisition signal.
Capacitor is electrically connected with pumping source and amplifier, by acoustical signal being converted to electric signal, then put by amplifier
It is big to export to loud speaker.
An alternative embodiment of the invention additionally provides a kind of promotion overload acoustic pressure method based on microphone, such as Fig. 3 institutes
Show, including
S1. the air pressure of microphone local environment is detected, as P0 is raised to P1, and forms acquisition signal output.
S2. first control signal output is formed according to the acquisition signal combination threshold signal, specially
S2.1. predetermined threshold value signal, threshold signal include first threshold signal and second threshold signal, wherein, the first threshold
Value signal is air pressure change value, and second threshold signal is duration value；
In the present embodiment, first threshold signal is 50PA air pressure changes, and second threshold signal is the 1S duration；
S2.2. it is more than first threshold signal in the variation of the acquisition signal and acquires the variation of signal simultaneously more than the first threshold
The duration of value signal is more than in the state of second threshold signal, if P0 to P1 variations is 60PA, more than 50PA air pressure changes,
Duration is 2S, more than the 1S duration, forms first control signal.
First control signal is to reduce signal of the pumping source to the driving voltage of capacitor.
S3. according to first control signal, the driving voltage to capacitor of the pumping source to capacitor is reduced, so as to promote wheat
Gram wind overload acoustic pressure performance, makes microphone enter high sound pressure protected mode.
If P1 drops to P2, P1 to P2 variations are -60PA, are unsatisfactory for step S2 conditions, it is defeated can not to form first control signal
Go out, therefore pumping source does not act on, therefore microphone exits high sound pressure protected mode.
In the present embodiment, microphone overload acoustic pressure performance is promoted, microphone is made to enter the means packet of high sound pressure protected mode
It includes by reducing driving voltage to capacitor of the pumping source to capacitor, only points out a kind of representative example here.Affiliated neck
The those of ordinary skill in domain equally can promote microphone overload acoustic pressure performance according to the present invention by the effect of other elements.
Yet another embodiment of the present invention additionally provides a kind of promotion overload acoustic pressure method based on microphone, such as Fig. 2-figure
Shown in 3, including
S1. the air pressure of microphone local environment is detected, as P0 is raised to P1, and forms acquisition signal output.
S2. first control signal output is formed according to the acquisition signal combination threshold signal and second control signal is defeated
Go out, specially
S2.1. predetermined threshold value signal, threshold signal include first threshold signal and second threshold signal, wherein, the first threshold
Value signal is air pressure change value, and second threshold signal is duration value；
In the present embodiment, first threshold signal is 50PA air pressure changes, and second threshold signal is the 1S duration；
S2.2. it is more than first threshold signal in the variation of the acquisition signal and acquires the variation of signal simultaneously more than the first threshold
The duration of value signal is more than in the state of second threshold signal, if P0 to P1 variations is 60PA, more than 50PA air pressure changes,
Duration is 2S, more than the 1S duration, forms first control signal and second control signal.
First control signal is to reduce signal of the pumping source to the driving voltage of capacitor, and second control signal is to reduce to put
Big device is to the signal of the output voltage amplification factor of capacitor.
S3. according to first control signal and second control signal, pumping source reduces pumping source to capacitor to capacitor
Driving voltage, while step-down amplifier is to the output voltage amplification factor of capacitor, so as to promote microphone overload acoustic pressure
Can, microphone is made to enter high sound pressure protected mode.
If P1 drops to P2, P1 to P2 variations are -60PA, are unsatisfactory for step S2 conditions, can not be formed first control signal and/
Or second control signal output, therefore pumping source and amplifier do not act on, therefore microphone exits high sound pressure protected mode.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention for those of ordinary skill in the art, may be used also on the basis of the above description
To make other variations or changes in different ways, all embodiments can not be exhaustive here, it is every to belong to this hair
The obvious changes or variations that bright technical solution is extended out are still in the row of protection scope of the present invention.
Claims (10)
1. a kind of microphone, including capacitor, which is characterized in that including
Acquisition module detects ambient pressure, forms acquisition signal output；
Control module is preset with threshold signal, and it is defeated to form first control signal according to the acquisition signal and the threshold signal
Go out；
Pumping source is electrically connected with the capacitor, and the driving voltage to capacitor is reduced according to first control signal.
2. a kind of microphone according to claim 1, which is characterized in that the threshold signal include first threshold signal and
Second threshold signal is more than first threshold signal, and the variation of the acquisition signal is more than the in the variation of the acquisition signal
The duration of one threshold signal is more than in the state of second threshold signal, and the control module exports first control signal.
3. a kind of microphone according to claim 1, which is characterized in that the microphone further comprises and the capacitance
The amplifier of device electrical connection；
The control module further forms second control signal output according to the acquisition signal and the threshold signal；
The amplifier reduces the output voltage amplification factor to capacitor according to second control signal.
4. a kind of microphone according to claim 3, which is characterized in that the threshold signal include first threshold signal and
Second threshold signal is more than first threshold signal, and the variation of the acquisition signal is more than the in the variation of the acquisition signal
The duration of one threshold signal is more than in the state of second threshold signal, and the control module exports second control signal.
5. a kind of microphone according to claim 1, which is characterized in that the microphone further comprises and control module
The setting module of connection, the setting module is according to the threshold signal in the input setting control module for receiving user.
A kind of 6. promotion overload acoustic pressure method based on microphone, which is characterized in that including
S1. the air pressure of microphone local environment is detected, forms acquisition signal output；
S2. preset threshold signal is combined according to the acquisition signal and forms first control signal output；
S3. the driving voltage to capacitor of pumping source is reduced according to first control signal.
A kind of 7. promotion overload acoustic pressure method based on microphone according to claim 6, which is characterized in that the step
S2 is specifically included
S2.1. the threshold signal is preset, the threshold signal includes first threshold signal and second threshold signal；
S2.2. it is more than first threshold signal in the variation of the acquisition signal and acquires the variation of signal simultaneously more than first threshold letter
Number duration be more than second threshold signal in the state of, formed first control signal and/or second control signal output.
A kind of 8. promotion overload acoustic pressure method based on microphone according to claim 6, which is characterized in that the method
Further comprise
S2. preset threshold signal is combined according to the acquisition signal and forms first control signal and second control signal output；
S3. the driving voltage to capacitor of pumping source is reduced according to first control signal, is put according to second control signal reduction
Big device is to the output voltage amplification factor of capacitor.
A kind of 9. promotion overload acoustic pressure method based on microphone according to claim 8, which is characterized in that the step
S2 is specifically included
S2.1. the threshold signal is preset, the threshold signal includes first threshold signal and second threshold signal；
S2.2. it is more than first threshold signal in the variation of the acquisition signal and acquires the variation of signal simultaneously more than first threshold letter
Number duration be more than second threshold signal in the state of, formed first control signal and second control signal output.
A kind of 10. promotion overload acoustic pressure method based on microphone according to claim 6, which is characterized in that the threshold
Value signal is inputted according to user and is set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711450441.1A CN108200519B (en) | 2017-12-27 | 2017-12-27 | Microphone and method for improving overload sound pressure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711450441.1A CN108200519B (en) | 2017-12-27 | 2017-12-27 | Microphone and method for improving overload sound pressure |
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| Publication Number | Publication Date |
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| CN108200519A true CN108200519A (en) | 2018-06-22 |
| CN108200519B CN108200519B (en) | 2021-03-30 |
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| CN201711450441.1A Active CN108200519B (en) | 2017-12-27 | 2017-12-27 | Microphone and method for improving overload sound pressure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113286239A (en) * | 2021-05-25 | 2021-08-20 | 维沃移动通信有限公司 | Voltage output method and device for microphone, microphone and electronic equipment |
| CN114697844A (en) * | 2022-04-01 | 2022-07-01 | 瑞声声学科技(深圳)有限公司 | Microphone circuit, microphone module and microphone sound pressure overload point lifting method |
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| CN113286239A (en) * | 2021-05-25 | 2021-08-20 | 维沃移动通信有限公司 | Voltage output method and device for microphone, microphone and electronic equipment |
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| CN108200519B (en) | 2021-03-30 |
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Effective date of registration: 20200617 Address after: 261031 building 10, Geer phase II Industrial Park, No. 102, Ronghua Road, Ronghua community, Xincheng street, high tech Zone, Weifang City, Shandong Province Applicant after: Weifang goer Microelectronics Co.,Ltd. Address before: 261031 No. 268 Dongfang Road, Weifang hi tech Development Zone, Shandong, Weifang Applicant before: GOERTEK Inc. |
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