基于听觉场景分析的局部放电降噪算法研究

摘要

In this paper,based on the partial discharge test of the high pressure chamber of the subway,the factory area and other noise environment,the paper proposes a kind of CASA algorithm,which is indepen-dent of the type of noise and the partial discharge noise reduction based on the analysis of the auditory scene.The algorithm uses two channels to col ect the signal energy,the simulation of the test instrument to extract the intensity difference of different channel signals,as a basis to identify the signal and noise.Then,the acoustic masking effect is used to cover the noise,and the enhancement of the partial discharge signal is realized.%该文针对周围为地铁，厂区等噪声环境下的高压室进行超声波局部放电测试，提出一种与噪声的类型无关、基于听觉场景分析的局部放电降噪CASA算法。该算法利用两个通道采集到的信号能量的不同，模拟局放测试仪提取不同信道信号的强度差，以此为依据来辨别信号和噪声。然后利用声学掩蔽效应，对噪声进行掩蔽，实现局部放电信号的增强。