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Inaudible sound wave based microphone anti-howling method and system

A microphone and sound wave technology, applied in the direction of frequency response correction, etc., can solve the problem of changing the frequency response characteristics of the audio system, and achieve the effect of suppressing howling

Inactive Publication Date: 2016-06-15
ENPING YEAMIC ELECTRONICS CO LTD
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AI Technical Summary

Problems solved by technology

The above method will change the frequency response characteristics of the entire audio system, which can only meet occasions with low sound quality requirements such as conferences and teaching, but cannot meet occasions with high sound quality requirements such as stage performances and KTV entertainment.

Method used

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  • Inaudible sound wave based microphone anti-howling method and system
  • Inaudible sound wave based microphone anti-howling method and system

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Embodiment Construction

[0017] refer to figure 1 , a kind of microphone anti-howling method based on inaudible sound waves of the present invention, described method comprises:

[0018] A sound wave signal that is inaudible to the human ear is generated through the microphone main unit. The inaudible sound wave signal is output together with the audio signal of the main unit through the output terminal of the microphone main unit, and then passes through the power amplifier, and the speaker restores the audio signal. Signal output to space;

[0019] The pickup head of the microphone picks up the inaudible sound wave signal output from the speaker to the space, and follows the audio signal of the microphone, and transmits it to the microphone host through wired or wireless methods to complete the transmission loop;

[0020] The microphone host samples the returned inaudible sound wave signal to determine whether the signal gain is higher than the threshold value. If it is higher than the threshold va...

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Abstract

The invention discloses a microphone anti-whistling method and system based on inaudible sound waves. To achieve the effect of avoiding howling. The system includes an inaudible sound wave output module, an inaudible sound wave sampling module, a main control module, an audio output control module, a power amplifier, and a loudspeaker that are arranged on the microphone host. The inaudible sound wave output module, the inaudible sound wave sampling module, the audio The output control module is respectively connected with the main control module, and the audio output control module is connected with the speaker through the power amplifier. The present invention does not change the frequency response characteristics of the audio system, and can meet all high-demand occasions.

Description

technical field [0001] The invention relates to a microphone anti-howling method and system based on inaudible sound waves. Background technique [0002] In the external sound amplification environment, the audio signal played by the speaker will be picked up again, and then amplified and played by the audio power amplifier to form a positive feedback of the sound wave. When the system volume is high, it is very easy to generate howling. [0003] The existing method for suppressing microphone howling is to suppress howling by using equipment such as a frequency shifter and a feedback suppressor. The above-mentioned method will change the frequency response characteristics of the entire audio system, which can only meet occasions with low sound quality requirements such as conferences and teaching, but cannot meet occasions with high sound quality requirements such as stage performances and KTV entertainment. Contents of the invention [0004] In order to overcome the defi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R3/04
CPCH04R3/04
Inventor 周湘源
Owner ENPING YEAMIC ELECTRONICS CO LTD
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