However,in the application,the acoustic signal is usually polluted by noise. To improve the quality of rubbing acoustic signal,Blind Source Separation and Wavelet De-noising are used together in the methods of P.S.

• 在实际环境中；碰摩声频信号常常受到噪声的污染；文中将盲源分离和小波消噪方法相结合；使用P.；S