利用时频分析的方法分析一段语音信号的时频特征，并进行降采样等处理，可直接运行-When the time-frequency analysis method to analyze the frequency of use of a voice signal characteristics, and down-sampling and other treatment, can be directly run

BP神经网络的数据分类-语音特征信号分类-The phonetic characteristics data of BP neural network classification- signal classification