语音增强，在频域实现的，自己写的，大家一起来交流下，-enhance speech，realized in frequence domain

portaudio 的声音录音和插入的源码，源码里有稍些的问题，已经修改通过，频率是16-the source code of capturing the audio and play,there aer some question,but they are done ,the frequence is 16000