A Wind Noise Detection Method Based on Microphone Array

A technology of microphone array and detection method, which is applied in speech analysis, instruments, sensor components, etc., and achieves the effects of wide application range, small calculation amount, and strong environmental adaptability

Active Publication Date: 2018-11-27
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when using microphone arrays to detect wind noise, existing detectors rarely use the time delay parameter between arrays, and the time delay value between arrays is a very important spatial feature with rich target features information

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  • A Wind Noise Detection Method Based on Microphone Array
  • A Wind Noise Detection Method Based on Microphone Array
  • A Wind Noise Detection Method Based on Microphone Array

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Embodiment Construction

[0021] Below in conjunction with specific embodiment, further illustrate the present invention. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

[0022] Embodiments of the present invention relate to a wind noise detection method based on a microphone array, as shown in the attached figure 1 As shown, it includes the following steps: (1) preprocessing the sound signal collected by the microphone array, including framing, removing the mean value, etc., and then using the delay estimation algorithm to calculate the delay value between each channel; (2) judging the calculat...

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Abstract

The invention relates to a method for detecting wind noise based on a microphone array. The method includes pretreating, including enframing and de-meaning, the sound signals acquired by the microphone array, calculating the time delay value of each channel through time-delay estimation algorithm, determining whether the time delay value exceeds a set threshold, and if yes, determining that the sound signals are wind noise, otherwise determining that the sound signals are other sound signals. The wind noise is detected based on principle transmission speed difference of wind noise and target sound signals in air and according to the time-delay parameters of channels of the microphone array. The method is simple and is low in computational complexity. The detection precision and power consumption are balanced, and the wind noise level is robust and highly adaptive to environment.

Description

technical field [0001] The invention relates to a method for detecting wind noise based on a microphone array, in particular to a method for detecting the presence or absence of wind noise by using the delay value between microphone arrays as a parameter. The invention belongs to the technical field of wind noise detection. Background technique [0002] Wind noise refers to the noise generated by the wind acting on the microstructure of the acoustic sensor, which is superimposed on the target signal and produces noise that damages the microphone signal. Wind noise is the most common and most difficult noise to deal with when microphones are used in outdoor scenes, and it has intermittent and non-stationary characteristics. [0003] For example, in hearing aids, wind noise detection is a necessary prerequisite for using the wind noise reduction algorithm. Unreasonable use of the wind noise reduction algorithm will deteriorate the signal, resulting in the destruction of the s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L21/02G10L25/84H04R3/00
Inventor 祖兴水郭峰刘华巍程勇博陈秋芳丁园园李宝清
Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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