中文说明：利用相关的时频分析工具箱对波形进行短时傅里叶变换处理，可以克服傅里叶变换没有时间分辨力的缺点，程序可以自动设置变换的点数等，使用简单，还能画出时频谱的等高线图。
English Description：
Using the relevant time-frequency analysis toolbox to process the waveform of short-time Fourier transform can overcome the shortcomings of Fourier transform without time resolution. The program can automatically set the number of transform points and so on. It is easy to use and can draw the contour map of time-frequency spectrum.