从麦克风采集语音数据，直接发送出去，没有RTP部分，做为测试用例不错。-collect data from microphone , and send out directly , have no RTP section . it is useful to be test case

音频系统，coding, modulation, AWGN, 通过最小距离探测码元，解码，播放。根据不同的SNR，测试在多小的SNR情况下，人耳能识别音频。-Audio systems, coding, modulation, AWGN, by minimizing the distance detection symbol, decoding, playing. Depending on the SNR, the test in the case of multiple small SNR,