对一段语音信号进行加噪处理，然后用低通滤波、带通滤波、高通滤波对其进行处理，程序完美运行，但要注意音频文件的路径问题，否则运行会报错！-A voice signal plus noise, then low-pass filter, band pass filter, high pass filter processing, the program works perfect, but to pay attention to the audio path to the file, otherwise the run will get an error!