在MATLAB环境中，得到语音信号的散点图，STFT变换和小波包变换。-In the MATLAB environment to obtain a scatter plot of the speech signal, STFT transform and wavelet packet transform.

语音信号处理前分离信号噪声,matlab环境下运行,使信号处理效果更好-Speech signal processing before the separation of signal to noise, running under the matlab environment, make the signal processing effect is better