CN207638883U - A kind of microphone - Google Patents
A kind of microphone Download PDFInfo
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- CN207638883U CN207638883U CN201721638671.6U CN201721638671U CN207638883U CN 207638883 U CN207638883 U CN 207638883U CN 201721638671 U CN201721638671 U CN 201721638671U CN 207638883 U CN207638883 U CN 207638883U
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- microphone
- vibrating diaphragm
- diaphragm load
- carbon nanotube
- detection circuit
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Abstract
The utility model is related to a kind of microphone, including vibrating diaphragm load and detection circuit, the vibrating diaphragm load includes shaking membrane substrate, and is coated on the carbon nanotube coating on the shaking membrane substrate surface, after receiving extraneous sound signal, is converted into the electric signal of variation；Detection circuit for detecting voltage or curent change in the vibrating diaphragm load, and extracts the sound signal.The utility model mainly uses the vibrating diaphragm load elements of carbon nanotube spraying so that microphone construction is simple, high sensitivity, size range is wide, frequency response is broad, the advantages that durable, good weatherability.
Description
Technical field
The utility model is related to electroacoustic techniques field more particularly to a kind of microphones.
Background technology
Microphone is sound-electric conversion equipment, also referred to as " microphone ", " microphone " etc..It is most attached most importance in sound system
A kind of one of electro-acoustic element wanted, its effect are to convert acoustic signals into electric signal, then be sent to sound console or amplifier, finally
It is played back from speaker system.That is, microphone is for picking up sound in the acoustic system, it is entire sound equipment
First link of system, the quality of performance quality, the influence to entire sound system are very big.
There are many type of microphone, can be divided into electrodynamic type, condenser type, electromagnetic type, piezoelectric type, semiconductor-type by transduction principle
Microphone.
The problem of common microphone has at present：
1, sensitivity is low：The sensitivity of microphone refers to the sound of microphone -- the ability of electrotransformation.Common moving-coil passes
For the sensitivity of sound device generally in -60dB or so, higher have-a 50dB, and the highly sensitive microphone of profession can reach -
40dB or so.
Highly sensitive microphone can pick up the sound of bigger under identical condition, can thus reduce rear class and put
The burden of big device, is easy to get high signal-to-noise ratio.
2, close effect：The close effect of microphone is its low frequency sensitivity meeting when microphone is in short distance pickup
Apparent to improve, distance is closer, and low frequency output is bigger.The effect of low frequency, this low coverage is stronger.
Close effect destroys the good frequency response of microphone, that is to say, that after this microphone, in original sound field
Low frequency part can abnormal increase.
3, it is limited to bear acoustic pressure：Excessive acoustic pressure can make microphone pickup quality bad, and be possible to damage microphone, because
All there are one the technical indicators of " maximum can bear acoustic pressure " for this microphone.
Utility model content
In order to overcome the sensitivity of existing microphone is low, be not durable the features such as, the utility model proposes a kind of transaudient
Device.The excellent physics jumpy that the microphone applies resistance value caused by the unique miniature deformation of carbon nanotube is special
Property, coordinate current source or voltage source, sound signal is made to be changed into voltage or current signal, to completion sound-electricity conversion.
To achieve the above object, the utility model provides a kind of microphone, including vibrating diaphragm load and detection circuit, described
Vibrating diaphragm load includes shaking membrane substrate, and is coated on the carbon nanotube coating on the shaking membrane substrate surface, for receiving extraneous sound
After frequency signal, it is converted into the electric signal of variation；Detection circuit, for detecting voltage or curent change in the vibrating diaphragm load,
And extract the sound signal.
Preferably, the carbon nanotube coating is coated on one side or the two sides of the shaking membrane substrate.
Preferably, the shaking membrane substrate has gossamery elastic material.
Preferably, further include current source or voltage source.
Preferably, the detection circuit further includes：Amplifier, what the amplifier was used to generate vibrating diaphragm load
Electric signal is amplified.
The utility model proposes microphone use carbon nanotube spraying membrane parts, the unique small shape of carbon nanotube
Become caused by resistance value excellent physical characteristic jumpy, it is simple in structure, reduce close effect, improve bear acoustic pressure and
The sensitivity of microphone, and good weatherability, it is not afraid of vibratory impulse and wet environment；Amplifier in peripheral detection circuit, because directly
The variable signal of extraction voltage or electric current is connect, amplifying circuit is easy to optimization, stablizes and efficiently, is conducive to the implementation of technique.
Description of the drawings
It is required in being described below to embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
The attached drawing used is briefly described.It should be evident that the accompanying drawings in the following description is only some implementations of the utility model
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of microphone circuit structure chart using current source of the utility model embodiment；
Fig. 2 is the microphone circuit structure chart that the utility model embodiment another kind uses current source；
Fig. 3 is a kind of microphone circuit structure chart using voltage source of the utility model embodiment；
Fig. 4 is the structure chart of the utility model embodiment vibrating diaphragm load.
Specific implementation mode
To make the technical solution of the utility model embodiment and becoming apparent from for advantage expression, below by attached drawing and implementation
Example, is described in further detail the technical solution of the utility model.
Fig. 1 is a kind of microphone circuit structure chart using current source of the utility model embodiment.As shown in Figure 1, this reality
A kind of microphone is proposed with novel, including：Power supply, current source, vibrating diaphragm load and detection circuit.
In microphone circuit, positive pole connects one end of current source, the other end connection vibrating diaphragm load of current source
One end of the other end ground connection of one end, power cathode and vibrating diaphragm load, detection circuit is connected between vibrating diaphragm load and current source.
After vibrating diaphragm load-receipt is to extraneous sound signal, resistance changes in vibrating diaphragm load, stablizes electricity since current source provides
Stream causes the voltage that vibrating diaphragm loads to change, the voltage change amplified in detection circuit detection vibrating diaphragm load, and extracts institute
State sound signal.
Wherein, in microphone, the voltage of power supply is sometimes unstable, increases a current source in circuit, by carrying
For stabling current, make microphone not by the voltage influence of power supply.The sensitivity of microphone is improved in this way.
In addition, as shown in Fig. 2, detection circuit further includes an amplifier.The peripheral circuit of carbon nanotube microphone circuit
An amplifier can be connected, since change in electric is smaller in microphone circuit, is carried out electric signal with an amplifier
Amplification.Because directly extracting the variable signal of voltage or electric current, amplifying circuit is easy to optimization, stablizes and efficiently, and peripheral circuit
Simply, cost is reduced.
Specifically, current source can be replaced with voltage source.As shown in figure 3, the utility model also proposed it is a kind of transaudient
Device, including：Power supply, voltage source, vibrating diaphragm load, resistance, amplifier and detection circuit.
In microphone circuit, positive pole connects one end of voltage source, the other end connection vibrating diaphragm load of voltage source
The other end of one end, vibrating diaphragm load connects resistance, and the other end ground connection of power cathode and resistance, one end of amplifier, which is connected to, to shake
Film loads between resistance, the other end of one end connection amplifier of detection circuit.When vibrating diaphragm load-receipt to extraneous audio frequency letter
After number, resistance changes in vibrating diaphragm load, since voltage source provides burning voltage, the electric current that vibrating diaphragm loads is caused to become
Change, electric signal is amplified by amplifier, the curent change amplified in detection circuit detection vibrating diaphragm load, and extracts the sound
Frequency signal.
Fig. 4 is the structure chart of the utility model vibrating diaphragm load.As shown in figure 4, vibrating diaphragm load includes that shaking membrane substrate and carbon are received
Mitron coating, carbon nanotube coating are coated on the surface of shaking membrane substrate, for extraneous sound signal to be converted into electric signal.
Specifically, carbon nanotube coating has resistance value, the urgency of resistance value caused by the unique miniature deformation of carbon nanotube
The excellent physical characteristic of drastic change, makes sound signal be changed into electric signal, to complete sound-electric conversion.This carbon nanotube
Microphone greatly improves the sensitivity of microphone, and carbon nanotube has good stability, so using carbon nanometer
The microphone good weatherability of pipe is not afraid of vibratory impulse and wet environment.
Wherein, spraying may be used in carbon nanotube coating or other modes are coated on one side or the two sides of shaking membrane substrate.
Specifically, shaking membrane substrate has gossamery elastic material.The shaking membrane substrate be with gossamery elastic material,
Carbon nanotube coating is coated on the surface of shaking membrane substrate, and when sound wave causes its vibrations, shaking membrane substrate is shaken by the external world
It is dynamic and when being deformed, the resistance value of carbon nanotube coating can regular variation therewith, the current source or voltage source of utilization
The voltage signal or electric current number that can be changed.The structure for simplifying vibrational system in this way, is conducive to the implementation of technique.
In the example of the utility model, each module realizes microphone function by operating as follows.
Power supply, current source, vibrating diaphragm load, amplifier and detection circuit in carbon nanotube microphone circuit, by Fig. 2 connection sides
Formula connects, and wherein power cathode and the other end of vibrating diaphragm load is grounded respectively.
When microphone works, electric current comes out from positive pole, is loaded followed by current source and vibrating diaphragm, forms a stabilization
Circuit.When vibrating diaphragm load receives extraneous sound signal, shaking membrane substrate vibrates during sound wave causes vibrating diaphragm to load, and is coated on vibrating diaphragm base
The resistance of carbon nanotube coating changes with vibration on material, since current source provides stable electricity in microphone circuit
Stream, changes so as to cause vibrating diaphragm load voltage.The voltage that sound signal is converted into variation is completed in vibrating diaphragm load at this time
Signal.
Carbon nanotube microphone peripheral circuit connects an amplifier, since voltage signal is smaller in microphone circuit,
By an amplifier, voltage signal is amplified, then be sent to detection circuit, for detecting the voltage in the vibrating diaphragm load
Variation, and extract wherein sound signal.
The utility model proposes microphone use carbon nanotube spraying membrane parts, the unique small shape of carbon nanotube
Become caused by resistance value excellent physical characteristic jumpy, it is simple in structure, reduce close effect, improve bear acoustic pressure and
The sensitivity of microphone, and good weatherability, it is not afraid of vibratory impulse and wet environment；Amplifier in peripheral detection circuit, because directly
The variable signal of extraction voltage or electric current is connect, amplifying circuit is easy to optimization, stablizes and efficiently, is conducive to the implementation of technique.
Above-described specific implementation mode, to the purpose of this utility model, technical solution and advantageous effect carried out into
One step is described in detail, it should be understood that the foregoing is merely specific embodiment of the present utility model, is not used to limit
Determine the scope of protection of the utility model, within the spirit and principle of the utility model, any modification for being made equally is replaced
It changes, improve, should be included within the scope of protection of this utility model.
Claims (5)
1. a kind of microphone, which is characterized in that including vibrating diaphragm load and detection circuit, the vibrating diaphragm load includes shaking membrane substrate,
And it is coated on the carbon nanotube coating on the shaking membrane substrate surface, after receiving extraneous sound signal, it is converted into variation
Electric signal；
Detection circuit for detecting voltage or curent change in the vibrating diaphragm load, and extracts the sound signal.
2. microphone according to claim 1, which is characterized in that the carbon nanotube coating is coated on the shaking membrane substrate
One side or two sides.
3. microphone according to claim 1, which is characterized in that the shaking membrane substrate has gossamery elastic material.
4. microphone according to claim 1, which is characterized in that further include：Current source or voltage source.
5. microphone according to claim 1, which is characterized in that the detection circuit further includes：Amplifier,
The amplifier is used to the electric signal that vibrating diaphragm load generates being amplified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721638671.6U CN207638883U (en) | 2017-11-30 | 2017-11-30 | A kind of microphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721638671.6U CN207638883U (en) | 2017-11-30 | 2017-11-30 | A kind of microphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207638883U true CN207638883U (en) | 2018-07-20 |
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ID=62854698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721638671.6U Active CN207638883U (en) | 2017-11-30 | 2017-11-30 | A kind of microphone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207638883U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109862497A (en) * | 2017-11-30 | 2019-06-07 | 北京七九七华音电子有限责任公司 | A kind of microphone |
-
2017
- 2017-11-30 CN CN201721638671.6U patent/CN207638883U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109862497A (en) * | 2017-11-30 | 2019-06-07 | 北京七九七华音电子有限责任公司 | A kind of microphone |
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