CN103248972B

CN103248972B - The microphone configurations feedback can be suppressed

Info

Publication number: CN103248972B
Application number: CN201210022396.0A
Authority: CN
Inventors: 彭彦儒
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-02-01
Filing date: 2012-02-01
Publication date: 2016-08-24
Anticipated expiration: 2032-02-01
Also published as: CN103248972A

Abstract

A kind of microphone configurations suppressing to feedback, it includes a hollow tube, a leading note passage is formed in its upper end, and set a microphone module in this body lower end, this body top another is provided with a thin film, it is at least provided with a joint-cutting, this thin film is made to form 2 half films respectively, wherein, when sound wave arrives this thin film, such half film is made to produce waveform respectively identical, amplitude halves, there are two sound waves of a time difference, and after by leading note passage, it is reunited into a sound wave, but because having the relation of time difference, the sound wave that newly synthesized sound wave and source of sound are produced has fine difference, therefore, feedback number of times the more, waveform accumulation difference is the biggest, suppression generation is uttered long and high-pitched sounds the most obvious.

Description

The microphone configurations feedback can be suppressed

Technical field

The present invention is relevant with a kind of microphone configurations, a kind of microphone configurations suppressing to feedback.

Background technology

When device uses mike radio reception, and through audio frequency expansion instrument amplifying power, then gone out by speaker broadcasting sound wave 1 Coming, if mike receives the sound wave that speaker discharges out repeatedly, this same frequency sound wave will be superposed to sound wave 2, referred to as Mike The back coupling phenomenon of wind, refers to shown in Fig. 1, for mike feedback phenomenon schematic diagram, when feedback gain reaches certain limit, and When exceeding speaker load, just make speaker produce ear-piercing howling, and then produce speaker, the destruction of power amplifier, Speaker is dialled the audio signals distortion put and affects the problems such as activity atmosphere.

Generally solve this problem, be all to adjust the distance between mike and speaker or extra in audio frequency expansion instrument Setting up electronic loop to solve, as set up feedback suppressor or frequency shifter etc., the principle of feedback suppressor is when going out in audio signals Existing too high crest, suppresses amplitude to this crest, reaches the purpose suppressing to utter long and high-pitched sounds, and the principle of frequency shifter is when speaker arrives The critical point uttered long and high-pitched sounds, reduces the gain of this audio frequency expansion instrument by this frequency shifter, reaches the purpose suppressing to utter long and high-pitched sounds.

Use above-mentioned feedback suppressor or frequency shifter, still have segmental defect to be modified, this feedback suppressor or frequency shifter Suppression utter long and high-pitched sounds phenomenon, be amplitude or the gain of audio frequency expansion instrument changing sound wave, can produce acoustic pressure subside, exhaustion and sound The problems such as distortion, and mostly be user and denounced, and need additionally to arrange an electronic loop, manufacturing cost can be improved and reduce Market competitiveness, therefore cannot meet actually required, and have necessity of improvement.

Summary of the invention

In view of this, present invention is primarily targeted at and a kind of microphone configurations suppressing and feedbacking is provided, and have Effect suppression is uttered long and high-pitched sounds phenomenon, and is easy to user and carries out raising one's voice operation.

For reaching above-mentioned purpose, the technical scheme is that and be achieved in that:

A kind of microphone configurations suppressing to feedback, consists predominantly of:

One microphone module；

One body, it is the body of two ends transmission, and this body upper end is provided with a leading note end, forms a leading note in this leading note end Passage, and this body lower end is provided with a transaudient end, forms an accommodation space in this transaudient end, separately this microphone module is available for arranging In this transaudient end；

One thin film, this thin film is located at this body top, and this thin film is at least provided with a joint-cutting, makes this thin film form 2 half Film.

Preferably, this slot length approximates the internal diameter of this body upper end.

Preferably, this joint-cutting is located in the middle of this thin film.

Preferably, this body is the round body of two ends transmission.

Preferably, this body is an elastic body.

Preferably, this film thickness is about 0.01mm to 0.1 mm.

The microphone configurations suppressing to feedback provided by the present invention, when sound wave arrives described half film, makes described half film Independent producing vibration, and form different some wave sources respectively, waveform is identical, amplitude subtracts to make the some wave source of described half film produce respectively Half, there are two sound waves of a time difference, and after by leading note passage, be reunited into a sound wave, but because having time difference Relation so that the sound wave that newly synthesized sound wave and source of sound produce has fine difference, therefore provided by the present invention suppression is feedback All can cumulative difference when microphone configurations is feedback every time so that same frequency sound wave Overlay declines, feedback number of times the more, ripple Shape cumulative difference is bigger, and suppression generation phenomenon of uttering long and high-pitched sounds is more obvious, and thereby, effectively suppression generation is uttered long and high-pitched sounds phenomenon, and, do not result in existing The problems such as the acoustic pressure that some feedback suppressors or frequency shifter produce is subsided, exhaustion and audio distortions.

Accompanying drawing explanation

Fig. 1 is the back coupling phenomenon schematic diagram of mike.

Fig. 2 is the exploded perspective view of the present invention.

Fig. 3 is the combination stereogram of the present invention.

Fig. 4 is the AA direction sectional view of Fig. 3.

Fig. 5 is top view of the present invention.

Fig. 6 is that 2 half films of the present invention form a wave source schematic diagram respectively.

Fig. 7 is the sound wave that produces of the source of sound of the present invention and the sonic waveforms figure that produces respectively of 2 half films.

Fig. 8 is that the present invention two sound wave synthesizes new sound wave schematic diagram.

Fig. 9 is the oscillogram of the sound wave that the newly synthesized sound wave of the present invention produces with source of sound.

Detailed description of the invention

Please refer to shown in Fig. 2, Fig. 3, Fig. 4 and Fig. 5, respectively the exploded perspective view of the present invention, this combination stereogram, The AA direction sectional view of Fig. 3 and top view, it is mainly made up of microphone module 10, body 20 and a thin film 30；Its In:

This microphone module 10, is a prior art, therefore is not intended to repeat.

This body 20, it is the circular body of two ends transmission, and this body 20 can be elastic body, and this body 20 upper end sets Having a leading note end 21, be provided with a leading note passage 22 in this leading note end 21, another and this body 20 lower end forms a transaudient end 23, this biography Form an accommodation space 24 in sound end 23, make this microphone module 10 may be disposed in this transaudient end 23.

This thin film 30, this thin film 30 is located in the middle of this body 20 top, and this thin film 30 at least provided with a joint-cutting 31, is made this Thin film 30 forms 2 half films 32 respectively, and in the present embodiment, this joint-cutting 31 quantity is one, and this joint-cutting 31 length approximates this leading note The interior electrical path length of end 21, this thin film 30 thickness is about 0.01mm to 0.1 mm.

For for further appreciate that structural feature of the present invention, application technology means and desired by effect of reaching, hereby by this Bright occupation mode is described, it is believed that can therefrom the present invention be had deeper into and concrete understanding, as described below:

Please refer to shown in Fig. 6 and Fig. 7, respectively 2 half films of the present invention form some wave source schematic diagram and a source of sound respectively The oscillogram of the sound wave that the sound wave produced and 2 half films produce respectively, the mike structure suppressing to feedback provided by the present invention Make, when the sound wave 100 that source of sound produces arrives described half film 32, make independent generation of described half film 32 vibrate, form difference respectively Some wave source, make described half film 32 some wave source produce the sound wave that waveform is identical, amplitude halves, have time difference 200 respectively, please The most simultaneously refering to shown in Fig. 8 and Fig. 9, two sound waves for the present invention synthesize new sound wave schematic diagram and the newly synthesized sound wave of the present invention With the waveform comparison figure of the sound wave that source of sound produces, after two sound waves pass through leading note passage 22, it is reunited into a sound wave 300, because of For having the relation of time difference 200 so that the sound wave 100 that newly synthesized sound wave 300 and source of sound produce has fine difference, wherein, Utter long and high-pitched sounds produce be same frequency sound wave because of feedback after, make the sound wave of same waveform after multiple stacking, beyond speaker load And produce and utter long and high-pitched sounds, review microphone configurations that the present invention can suppress to feedback when feedbacking every time all can cumulative difference, feedback the most Secondary, sonic waveforms difference is the biggest so that same frequency sound wave Overlay declines, and suppression phenomenon of uttering long and high-pitched sounds is the most obvious.

The microphone configurations of the suppressed back coupling of the present invention is not limited to described in present embodiment, can be also ellipse such as this body Circular and square, can be also a reed such as this thin film, can be also a glued membrane such as this thin film, as this can suppress the mike structure of back coupling Make and may also suppress wind and cut the noises such as sound.

The above, only presently preferred embodiments of the present invention, it is not intended to limit protection scope of the present invention.

Claims

1. one kind can be suppressed the mike feedback, it is characterised in that include:

One microphone module；

One body, it is the body of two ends transmission, and this body upper end is provided with a leading note end, forms a leading note and lead in this leading note end Road, and this body lower end is provided with a transaudient end, forms an accommodation space in this transaudient end, separately this microphone module is for being arranged at this In transaudient end；

One thin film, this thin film is located at this body top, and this thin film is at least provided with a joint-cutting, makes this thin film form 2 half films；

Whereby, when sound wave arrives described half film, make described half film independently produce vibration, form different some wave sources respectively, make The point wave source of described half film produces two sound waves that waveform is identical, amplitude halves, have a time difference respectively, and two sound waves pass through leading note After channel, recombine a sound wave, but because of the relation of time difference so that the sound wave that newly synthesized sound wave and source of sound produce has micro- Little difference, thus reach suppression and produce the effect uttered long and high-pitched sounds.

The mike suppressing to feedback the most according to claim 1, it is characterised in that this slot length approximates this body The internal diameter of upper end.

The mike suppressing to feedback the most according to claim 1, it is characterised in that this joint-cutting is located in the middle of this thin film.

The mike suppressing to feedback the most according to claim 1, it is characterised in that this body is the round of two ends transmission Body.

The mike suppressing to feedback the most according to claim 1, it is characterised in that this body is an elastic body.

The mike suppressing to feedback the most according to claim 1, it is characterised in that this film thickness is about 0.01mm extremely 0.1 mm。