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, otherwi