中文说明：通过对.wav的音频文件进行短时傅里叶变换，画出其三维时频图。亲测可用。
English Description：
Through. wav audio files for a short-time Fourier transform, draw its three-dimension time-frequency diagram. Measurement is available.
Short-time Fourier transform, draw three-dimension
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中文说明：通过对.wav的音频文件进行短时傅里叶变换，画出其三维时频图。亲测可用。
English Description：
Through. wav audio files for a short-time Fourier transform, draw its three-dimension time-frequency diagram. Measurement is available.