Howling suppression device and method

A technology for suppressing devices and radio frequency devices, which can be applied to frequency/directional characteristic devices, transmission systems, electrical components, etc., and can solve problems such as poor suppression effect.

Active Publication Date: 2018-06-15
MC DEVICES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Based on this, it is necessary to provide a howling suppression device and method with a good suppression effect for the problem of poor suppression effect of the traditional howling suppression method

Method used

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  • Howling suppression device and method
  • Howling suppression device and method

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Embodiment Construction

[0022] In one embodiment, such as figure 1 As shown, a howling suppressing device includes a band-pass filter 130, a processor 120, a band-stop notch filter 110 and a wireless transmitting radio frequency device 140, and the band-pass filter 130 is connected to the band-stop notch filter 110 through the processor 120 , the band-stop notch filter 110 is connected to the wireless transmitting radio frequency device 140, the band-pass filter 130 and the band-stop notch filter 110 are used to connect the audio processing system 200, and the band-pass filter 130 is used to receive the audio signal sent by the audio processing system 200 Obtaining the frequency of the audio signal according to the audio signal, judging whether the frequency of the audio signal belongs to the set bandwidth, when the frequency of the audio signal belongs to the set bandwidth, generating a howling signal according to the frequency of the audio signal and sending it to the processor 120; processing The ...

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Abstract

The invention relates to a howling suppression device and method. A band-pass filter receives an audio signal sent by an audio processing system, judges whether the frequency of the audio signal belongs to a set bandwidth, and generates a howling signal according to the frequency of the audio signal and sends the howling signal to a processor when the frequency of the audio signal belongs to the set bandwidth; the processor sends a control signal to a rejection trap according to the received howling signal; the rejection trap receives the audio signal and the control signal sent by the processor to suppress the frequency of the audio signal in order to acquire a howling-free audio signal and sends the howling-free audio signal to a wireless transmitting radio frequency device; and the wireless transmitting radio frequency receives and transmits the howling-free audio signal. Automatic frequency sweep is carried out on the audio signal through the band-pass filter, a frequency point ofthe howling is detected and the howling signal is sent to the processor, the processor sends the control signal to the rejection trap in order to determine the rejection frequency of the rejection trap, the howling can be suppressed on the premise that the transmission power loss is small, and the suppression effect is good.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a howling suppression device and method. Background technique [0002] In the sound system, the user inputs voice through the microphone, and the voice is wirelessly transmitted to the speaker for amplification and playback. During the transmission process, because the sound wave signal fed back to the microphone is required to be in phase with the sound wave signal input by the original sound source of the microphone and the sound feedback loop is positive feedback, that is, when the feedback gain is greater than 1, it will cause howling, thereby destroying the user's hearing experience. The wireless audio processing system loads audio transmission and reception methods, and howling is a frequent occurrence. [0003] The traditional way to solve the howling is to reduce the transmission power or reduce the receiving sensitivity, which is a measure of rights and interests ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R1/22H04B1/04
CPCH04B1/04H04B1/0475H04R1/22
Inventor 袁远周思宁王澜
Owner MC DEVICES CO LTD
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