CN108200519B - Microphone and method for improving overload sound pressure - Google Patents
Microphone and method for improving overload sound pressure Download PDFInfo
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- CN108200519B CN108200519B CN201711450441.1A CN201711450441A CN108200519B CN 108200519 B CN108200519 B CN 108200519B CN 201711450441 A CN201711450441 A CN 201711450441A CN 108200519 B CN108200519 B CN 108200519B
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- signal
- microphone
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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
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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
-
- 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
Abstract
The invention discloses a microphone, which comprises an acquisition module, a signal processing module and a signal processing module, wherein the acquisition module is used for detecting ambient air pressure to form acquisition signal output; the control module is preset with a threshold signal and forms a first control signal and a second control signal to be output according to the acquisition signal and the threshold signal; the pump power supply is electrically connected with the capacitor and reduces the excitation voltage of the pump power supply to the capacitor according to the first control signal; an amplifier may be further included, electrically coupled to the capacitor, for reducing an output voltage amplification of the capacitor based on a second control signal. The microphone overload sound pressure performance is improved through the action of the pump power supply and the amplifier, so that the microphone enters a high sound pressure protection mode. The invention also discloses a microphone-based method for improving overload sound pressure. According to the invention, when the sound pressure of the microphone used by a user is higher, the high sound pressure tolerance of the microphone product is improved, so that the distortion of the picked sound signal is avoided.
Description
Technical Field
The invention relates to the technical field of sound signal processing, in particular to a microphone and a method for improving overload sound pressure.
Background
When a user uses the microphone, the singing voice is too big, the voice is too high, and the sound pressure is higher, such as sound pressure above 130dBSPL, the amplified microphone signal voltage exceeds the optimal working range of the sound processing circuit, so that the picked sound signal is distorted, and the microphone performance is reduced.
Therefore, it is desirable to provide a microphone and a method for increasing the overload sound pressure.
Disclosure of Invention
It is an object of the present invention to provide a microphone.
Another object of the present invention is to provide a microphone-based method for increasing the overload sound pressure.
In order to achieve the purpose, the invention adopts the following technical scheme:
a microphone comprises a capacitor, including
The acquisition module detects ambient air pressure to form acquisition signal output;
the control module is preset with a threshold signal and forms a first control signal output according to the acquisition signal and the threshold signal;
and the pump power supply is electrically connected with the capacitor and reduces the excitation voltage of the capacitor according to the first control signal.
Preferably, the threshold signal includes a first threshold signal and a second threshold signal, and the control module outputs the first control signal in a state that a variation of the acquisition signal is greater than the first threshold signal and a duration of the variation of the acquisition signal being greater than the first threshold signal is greater than the second threshold signal.
Preferably, the microphone further comprises an amplifier electrically connected to the capacitor;
the control module further forms a second control signal output according to the acquisition signal and the threshold signal;
the amplifier reduces the amplification factor of the output voltage of the capacitor according to the second control signal.
Preferably, the threshold signal includes a first threshold signal and a second threshold signal, and the control module outputs the second control signal in a state that the variation of the acquisition signal is greater than the first threshold signal and the duration of the variation of the acquisition signal that is greater than the first threshold signal is greater than the second threshold signal.
Preferably, the microphone further comprises a setting module connected to the control module, and the setting module sets the threshold signal in the control module according to the input received from the user.
A microphone-based method for increasing overload sound pressure comprises
S1, detecting the air pressure of the environment where a microphone is located to form collected signal output;
s2, combining the acquired signal with a preset threshold signal to form a first control signal output;
and S3, reducing the excitation voltage of the pump power supply to the capacitor according to the first control signal.
Preferably, the step S2 specifically includes
S2.1, presetting the threshold signal, wherein the threshold signal comprises a first threshold signal and a second threshold signal;
and S2.2, forming a first control signal and/or a second control signal to output in the state that the change of the acquired signal is greater than the first threshold signal and the duration of the change of the acquired signal is greater than the second threshold signal.
Preferably, the method further comprises
S2, combining the acquired signal with a preset threshold signal to form a first control signal and a second control signal to be output;
and S3, reducing the excitation voltage of the pump power supply to the capacitor according to the first control signal, and reducing the amplification factor of the output voltage of the amplifier to the capacitor according to the second control signal.
Preferably, the step S2 specifically includes
S2.1, presetting the threshold signal, wherein the threshold signal comprises a first threshold signal and a second threshold signal;
and S2.2, forming a first control signal and a second control signal to output in the state that the change of the acquired signal is greater than the first threshold signal and the duration of the change of the acquired signal is greater than the second threshold signal.
Preferably, the threshold signal is set according to a user input.
The invention has the following beneficial effects:
when the microphone picks up the sound pressure with larger change when inputting, through reducing the pump power supply to the excitation voltage of the capacitor and/or reducing the amplifier to the output voltage amplification factor of the capacitor, thereby avoiding picking up the sound distortion, greatly improving the sound pressure tolerance of the microphone product, improving the sound quality of the microphone output, and adapting to the specific microphone use scene.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Fig. 1 shows a microphone structure diagram for raising overload sound pressure.
Fig. 2 shows a flow chart of a microphone-based method of boosting overload sound pressure.
Fig. 3 shows a schematic view of the air pressure detected by the acquisition module.
Detailed Description
In order to more clearly illustrate the invention, the invention is further described below with reference to preferred embodiments and the accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.
In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It may be evident, however, that such embodiment(s) may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing one or more embodiments.
In order to more clearly illustrate the invention, the invention is further described below with reference to preferred embodiments and the accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.
The terms "first" and "second" in the following description of the embodiments are not intended to be limiting, but are merely used for descriptive purposes and are not intended to limit the scope of the invention.
One embodiment of the present invention provides a microphone, as shown in fig. 1, which includes a capacitor, an acquisition module, a control module, a pump power supply, an amplifier, and a setting module.
The acquisition module is provided with an air pressure sensor and detects air pressure to form acquisition signal output. The collected signal is the air pressure in the environment where the microphone is located.
The control module is preset with a threshold signal, receives the acquisition signal, forms a first control signal output according to the acquisition signal and the threshold signal, and further can form a second control signal output.
And the setting module is connected with the control module and used for setting the threshold signal of the control module according to the input of a user so as to meet the requirements of different sound pressure occasions. The setting module may be a dial, a knob, or an electronic screen, to name just a few representative examples.
The threshold signal includes a first threshold signal and a second threshold signal. The first threshold signal is a 50PA air pressure change (corresponding to a sound pressure of 130 dBSPL) and the second threshold signal is 1S duration. The specific values of the first threshold signal and the second threshold signal in the present embodiment may be preset according to user input, and only one representative example is indicated here. The control module judges that the environment of the microphone is high sound pressure to form a first control signal and further form a second control signal output when the change of the collected signal is larger than a first threshold signal, namely the change of the air pressure is larger than 50PA, and the duration time of the change of the collected signal is larger than a second threshold signal, namely the duration time is larger than 1S.
The first control signal is a signal for reducing the pump power supply pump voltage to the capacitor, and the second control signal is a signal for reducing the amplification factor of the output voltage of the amplifier to the capacitor. Other control signals may also be present, as long as the effect of increasing the microphone overload sound pressure is achieved, and the two control signals in the present embodiment are not limited to the control signal form, and only a few representative examples are indicated here.
The microphone components, such as the pump power supply in this embodiment, act in the presence of the first control signal, or the amplifier, acts in the presence of the second control signal, thereby increasing the microphone overload sound pressure performance, causing the microphone to enter the high sound pressure protection mode, and does not act in the absence of the control signal, thereby restoring the microphone overload sound pressure performance, causing the microphone to exit the high sound pressure protection mode.
And the pump power supply is electrically connected with the power supply and the capacitor, receives the power supply input and further outputs excitation voltage to the capacitor. The pump power supply receives a first control signal and reduces an excitation voltage to the capacitor in accordance with the first control signal.
And an amplifier as an output port electrically connected to the ground line and the capacitor. The amplifier receives the second control signal and reduces the amplification factor of the output voltage of the capacitor according to the second control signal.
In this embodiment, the means for improving the microphone overload sound pressure performance and enabling the microphone to enter the high sound pressure protection mode includes reducing the excitation voltage to the capacitor by the pump power supply, reducing the amplification factor of the output voltage to the capacitor by the amplifier, reducing the excitation voltage to the capacitor by the pump power supply and simultaneously reducing the amplification factor of the output voltage to the capacitor by the amplifier, and only a few representative examples are indicated here. The person skilled in the art can also improve the microphone overload sound pressure performance by the action of other elements according to the invention.
The magnitude of the reduction depends on the magnitude of the pressure change in the acquired signal.
And the capacitor is electrically connected with the pump power supply and the amplifier, converts the acoustic signal into an electric signal, and amplifies and outputs the electric signal to the loudspeaker through the amplifier.
Another embodiment of the present invention further provides a microphone-based method for increasing an overload sound pressure, as shown in fig. 3, including
S1, detecting the air pressure of the environment where the microphone is located, such as the pressure from P0 to P1, and forming a collected signal output.
S2, forming a first control signal output according to the collected signal and a threshold signal, specifically
S2.1, presetting threshold signals, wherein the threshold signals comprise a first threshold signal and a second threshold signal, the first threshold signal is an air pressure change value, and the second threshold signal is a duration value;
in this embodiment, the first threshold signal is 50PA air pressure change, and the second threshold signal is 1S duration;
s2.2, under the condition that the change of the acquisition signal is larger than the first threshold signal and the duration of the change of the acquisition signal is larger than the second threshold signal, if the change from P0 to P1 is 60PA, the change is larger than 50PA air pressure, the duration is 2S and is larger than 1S duration, and a first control signal is formed.
The first control signal is a signal for lowering the pump power supply pump voltage to the capacitor.
And S3, according to the first control signal, reducing the excitation voltage of the pump power supply to the capacitor, so that the overload sound pressure performance of the microphone is improved, and the microphone enters a high sound pressure protection mode.
If the P1 is decreased to P2, the P1 to P2 change to-60 PA, the condition of step S2 is not satisfied, the first control signal output cannot be formed, and thus the pump power is not applied, and the microphone thus exits the high sound pressure protection mode.
In the present embodiment, the means for improving the microphone overload sound pressure performance and putting the microphone into the high sound pressure protection mode includes reducing the excitation voltage of the pump power supply to the capacitor, and this is merely a representative example. The person skilled in the art can also improve the microphone overload sound pressure performance by the action of other elements according to the invention.
Still another embodiment of the present invention provides a microphone-based method for increasing an overload sound pressure, as shown in fig. 2 to 3, including
S1, detecting the air pressure of the environment where the microphone is located, such as the pressure from P0 to P1, and forming a collected signal output.
S2, combining the collected signal with a threshold signal to form a first control signal output and a second control signal output, specifically
S2.1, presetting threshold signals, wherein the threshold signals comprise a first threshold signal and a second threshold signal, the first threshold signal is an air pressure change value, and the second threshold signal is a duration value;
in this embodiment, the first threshold signal is 50PA air pressure change, and the second threshold signal is 1S duration;
s2.2, under the condition that the change of the acquisition signal is larger than the first threshold signal and the duration of the change of the acquisition signal is larger than the second threshold signal, if the change from P0 to P1 is 60PA, the change is larger than 50PA air pressure, the duration is 2S and is larger than 1S duration, and a first control signal and a second control signal are formed.
The first control signal is a signal for reducing the pump power supply pump voltage to the capacitor, and the second control signal is a signal for reducing the amplification factor of the output voltage of the amplifier to the capacitor.
And S3, according to the first control signal and the second control signal, the pump power supply reduces the excitation voltage of the pump power supply to the capacitor, and simultaneously reduces the amplification factor of the output voltage of the amplifier to the capacitor, so that the overload sound pressure performance of the microphone is improved, and the microphone enters a high sound pressure protection mode.
If P1 goes down to P2, P1 through P2 change to-60 PA, the condition of step S2 is not met, the first control signal and/or the second control signal output cannot be formed, and thus neither the pump power supply nor the amplifier is active, and the microphone therefore exits the high sound pressure protection mode.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations or modifications may be made on the basis of the above description, and all embodiments may not be exhaustive, and all obvious variations or modifications may be included within the scope of the present invention.
Claims (7)
1. A microphone comprising a capacitor, characterized in that it comprises
The acquisition module detects ambient air pressure to form acquisition signal output;
the control module is preset with a threshold signal and forms a first control signal output according to the acquisition signal and the threshold signal;
a pump power supply electrically connected to the capacitor for reducing an excitation voltage to the capacitor according to a first control signal;
the microphone further comprises an amplifier electrically connected to the capacitor;
the control module further forms a second control signal output according to the acquisition signal and the threshold signal;
the amplifier reduces the amplification factor of the output voltage of the capacitor according to the second control signal.
2. The microphone of claim 1, wherein the threshold signal comprises a first threshold signal and a second threshold signal, and the control module outputs the first control signal in a state that the variation of the collecting signal is greater than the first threshold signal and the duration of the variation of the collecting signal is greater than the second threshold signal.
3. The microphone of claim 1, wherein the threshold signal comprises a first threshold signal and a second threshold signal, and the control module outputs the second control signal in a state that the variation of the collecting signal is greater than the first threshold signal and the duration of the variation of the collecting signal is greater than the second threshold signal.
4. The microphone of claim 1, further comprising a setting module connected to the control module, wherein the setting module sets the threshold signal in the control module according to an input received from a user.
5. A microphone-based method for increasing overload sound pressure is characterized by comprising
S1, detecting the air pressure of the environment where the microphone is located to form a collected signal output;
s2, combining the collected signal with a preset threshold signal to form a first control signal and a second control signal to be output;
and S3, the driving voltage of the pump power supply to the capacitor is reduced according to the first control signal, and the amplification factor of the output voltage of the amplifier to the capacitor is reduced according to the second control signal.
6. The microphone-based method for increasing sound pressure of overload situations as claimed in claim 5, wherein the step S2 specifically includes
S2.1, presetting the threshold signal, wherein the threshold signal comprises a first threshold signal and a second threshold signal;
and S2.2, forming a first control signal and/or a second control signal to output in the state that the change of the acquired signal is greater than the first threshold signal and the duration of the change of the acquired signal is greater than the second threshold signal.
7. The microphone-based sound pressure overload boosting method of claim 5, wherein the threshold signal is set according to a user input.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711450441.1A CN108200519B (en) | 2017-12-27 | 2017-12-27 | Microphone and method for improving overload sound pressure |
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| CN201711450441.1A CN108200519B (en) | 2017-12-27 | 2017-12-27 | Microphone and method for improving overload sound pressure |
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| CN108200519A CN108200519A (en) | 2018-06-22 |
| CN108200519B true CN108200519B (en) | 2021-03-30 |
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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 |
| CN114697844B (en) * | 2022-04-01 | 2023-05-30 | 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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| JP2004129038A (en) * | 2002-10-04 | 2004-04-22 | Sony Corp | Method and device for adjusting level of microphone and electronic equipment |
| CN101621728A (en) * | 2009-06-25 | 2010-01-06 | 北京卓锐微技术有限公司 | Method and device for calibrating sensitivity of microphone |
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