对音频进行短时傅里叶变化，维纳滤波后还原，可以滤去20db不相关噪声-Short time Fourier transform of the audio, after the reduction Wiener filter can filter out irrelevant noise 20db

音频库，包括短时傅里叶变换，信干比计算等-Audio library, including the short-time Fourier transform, signal to interference ratio calculation

该程序中audiorec.py可以录制一个音频文件，stft.py可以对该文件做短时傅里叶变化进行分析，得到音频文件的频率信息，进而可以根据音频文件的来源判断其中的信息。在压缩包中还包含一个音频文件可以作为例子。- The program audiorec.py can record an audio file, stft.py can make the file changes short time Fourier analysis to obtain frequency informat