中文说明：
利用自相关或平均幅度差提取基音原理，帧长160，帧移80。求能量E、过零率Z和基音周期pitch；采用自相关法或平均幅度差法求取基音周期，基音周期范围（80~400hz）；画出能量、过零率和基音曲线。
English Description：
Using the principle of autocorrelation or average amplitude difference to extract pitch, the frame length is 160 and the frame shift is 80. Find the energy E, zero crossing rate Z and pitch period pitch; The pitch period is calculated by autocorrelation method or average amplitude difference method, and the pitch period range is 80 ~ 400 Hz; Draw the energy, zero crossing rate and pitch curve