CN201207731Y

CN201207731Y - Microphone and microphone array system

Info

Publication number: CN201207731Y
Application number: CNU2008200945114U
Authority: CN
Inventors: 吴宗汉; 朱纪文; 唐啸
Original assignee: SHENZHEN HORN ELECTROACOUSTIC TECHNOLOGY Co Ltd
Current assignee: Shenzhen Horn Audio Co Ltd
Priority date: 2008-06-03
Filing date: 2008-06-03
Publication date: 2009-03-11
Anticipated expiration: 2018-06-03

Abstract

The utility model is applicable to an audio equipment field, providing a microphone and a microphone array system. The microphone comprises a film and two back electrodes. A pad is arranged between the film and the two back electrodes of the microphone. The microphone provided by the utility model includes two back electrodes, and the pad is arranged between the film and the two back electrodes of the microphone. Using a structure that a film corresponds to two back electrodes to form a capacitor between the two electrodes realizes the dual signal output effect which can only be achieved by two traditional microphones.

Description

A kind of microphone and microphone array system

Technical field

The utility model belongs to the speech ciphering equipment field, relates in particular to a kind of microphone and microphone array system.

Background technology

Along with the development of technology and user requirements at the higher level to various sound effects, present single microphone device begins to be developed to high sensitivity and high-quality radio reception effect by the translation function of simple realization acoustic-electric, (integrated circuit, IC) pipe is realized high sensitivity and the technology that realizes high-fidelity radio reception with the array system that a plurality of microphones are formed to have occurred the employing integrated circuit thus.

In order to obtain a microphone array system, must guarantee the coupling unanimity of intrasystem microphone characteristics parameter, a plurality of microphone occupation space are also bigger, for accurately controlling the parameters of microphone finished product, are necessary to reduce the microphone occupation space on the basis that guarantees transaudient effect.

The utility model content

The purpose of this utility model is to provide a kind of microphone, is intended to solve the bigger problem of a plurality of microphone occupation space in the microphone array system.

Another purpose of the present utility model is to provide a kind of microphone, and described microphone comprises diaphragm, and described microphone also includes two backplanes, is respectively arranged with pad between described diaphragm and described two backplanes.

Another purpose of the present utility model is to provide a kind of microphone array system, described microphone array system comprises at least one microphone, described microphone comprises diaphragm, and described microphone also includes two backplanes, is respectively arranged with pad between described diaphragm and described two backplanes.

The microphone that the utility model embodiment provides includes two backplanes, be respectively arranged with pad between the diaphragm of microphone and two backplanes, on the basis of a microphone, adopt the structure of corresponding two backplanes of a vibrating diaphragm, form two interelectrode capacitances, needing to have realized two dual signal output effects that traditional microphones just can obtain.

Description of drawings

Fig. 1 is the structure chart of the microphone that provides of the utility model embodiment;

Fig. 2 is the vertical view of the microphone that provides of the utility model embodiment.

Embodiment

In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.

The microphone that the utility model embodiment provides includes two backplanes, is respectively arranged with pad between the diaphragm of microphone and two backplanes, on the basis of a microphone, adopts the structure of corresponding two backplanes of a vibrating diaphragm, forms two interelectrode capacitances.

Fig. 1 shows the structure of the microphone that the utility model embodiment provides, and Fig. 2 is the vertical view of the microphone that provides of the utility model, below in conjunction with Fig. 1 and Fig. 2 the utility model is elaborated.

Wherein, this microphone comprises diaphragm 5; Zona 4; Pad 12,13; Backplane 8,11 etc.

In specific implementation process, diaphragm 5 connects earth polars by zona 4, and diaphragm 5 is as two interelectrode capacitance one ends, experiences acoustic pressure and vibrates, and causes the variation of interelectrode capacitance, realizes the conversion of acoustic-electric; Thereby pad 12,13 forms electric capacity at interval with diaphragm 5 and backplane 8,11, backplane 8,11 is as each end of two interelectrode capacitances, and the small electrical signals that the capacitance variations of gained causes conducted to corresponding effect transistor (FieldEffect Transistor, FET) 1 gate input, FET plays the effect of impedance conversion and gain amplification, and the backplane of the utility model embodiment is a disjunctor copper ring backplane.

See also Fig. 2: A, B are two signal output parts, and C is an earth terminal.

In specific implementation process, zona 4, diaphragm 5, backplane 11 and pad 13 form the converting system of a cover acoustic-electric, after the extraneous sound source work, sound enters from sound hole, under the acoustic pressure effect, cause diaphragm 5 vibrations, the acoustic pressure size causes the variation of diaphragm 5 Oscillation Amplitude sizes, and the sound frequency difference causes diaphragm 5 vibration frequency change, and diaphragm 5 is done harmonic vibration, cause the variation of the electric capacity spacing d between the pad 13, root is according to C=ε S/d, and capacitance changes thereupon, again according to C=Q/U, Q is the quantity of electric charge of electret on vibrating membrane, remain unchanged, capacitor C changes and causes a signal of telecommunication U, and resulting signal U is transmitted to the grid of a FET by disjunctor copper ring backplane 11, after the impedance conversion of FET, obtain to utilize signal, and draw from solder joint A shown in Figure 2.

Equally, zona 4, diaphragm 5, backplane 8 and pad 12 also form the converting system of a cover acoustic-electric, after the extraneous sound source work, sound enters from sound hole, under the acoustic pressure effect, cause the vibration of diaphragm 5, diaphragm 5 is done harmonic vibration, cause the variation of the electric capacity spacing d between the pad 12, root is according to C=ε S/d, and capacitance changes thereupon, again according to C=Q/U, Q is the quantity of electric charge of electret on vibrating membrane, remain unchanged, capacitor C changes and causes a signal of telecommunication U ', and resulting signal U ' is transmitted to the grid of a FET by disjunctor copper ring backplane 11, after the impedance conversion of FET, obtain to utilize signal, and draw from welding point B shown in Figure 2.

More than two the cover acoustic-electrics converting system shared zona 4, diaphragm 5, also promptly in the converting system of two cover acoustic-electrics the vibration source of two signals identical, the Oscillation Amplitude in any moment is identical, under the condition that other material parameter is set, cause that two interelectrode capacitance variable quantities are identical, but variation tendency is opposite, so phase place is opposite.And except that phase place, other temporal properties of two signals are identical, so frequency response curve and amplitude time graph are identical, and this has just reached the requirement of signal stack coupling.

The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.

Claims

1, a kind of microphone comprises diaphragm, it is characterized in that, described microphone includes two backplanes, is respectively arranged with pad between described diaphragm and described two backplanes.

2, microphone as claimed in claim 1 is characterized in that, described microphone also comprises two field-effect transistors, described two field-effect transistors and the corresponding connection respectively of described two backplanes.

3, microphone as claimed in claim 1 is characterized in that, described backplane is a disjunctor copper ring backplane.

4, microphone as claimed in claim 1 is characterized in that, described microphone also comprises a zona, and described diaphragm connects the earth polar by described zona.

5, a kind of microphone array system is characterized in that, described microphone array system comprises at least one microphone, and described microphone comprises diaphragm, and described microphone also includes two backplanes, is respectively arranged with pad between described diaphragm and described two backplanes.

6, microphone array as claimed in claim 5 system is characterized in that described microphone also comprises two field-effect transistors, described two field-effect transistors and the corresponding connection respectively of described two backplanes.

7, microphone array as claimed in claim 5 system is characterized in that described backplane is a disjunctor copper ring backplane.

8, microphone array as claimed in claim 5 system is characterized in that described microphone also comprises a zona, and described diaphragm connects the earth polar by described zona.