用于计算声音信号的短时傅立叶变换，默认情况下窗口重叠了50％，计算STFT三个窗口中的矩形并转化为声音信号。-To compute STFT three windows are available in this code Rectangular, Hamming and Hanning. By default window overlapping is set by 50 . One can easily compute the STFT of sound signals.Results ar