说明：  本文简要介绍了语音信号采集与分析的发展史以及语音信号的特征、采集与分析方法，并通过PC机录制自己的一段声音，运用Matlab进行仿真分析，最后加入噪声进行滤波处理，比较滤波前后的变化
(This paper briefly introduces the history of the development of speech signal acquisition and analysis, the feature of speech signal, the method of collecting and analyzing the voice signal, recording one's own voice by PC, using Matlab to simulate and analyzing, and finally adding noise to filter and compare the change before and after filtering.)