语音的识别的前端技术，语音的基音周期检测-Front-end voice recognition technology, Voice Pitch Detection

程序主要是求一段音频数据的基音频率 jiyinzhouqi.m --------求基音周期 find_maxn.m --------求自相关函数的最大值 test2.wav --------程序中用到的示例wav数据文件-The program is mainly the fundamental frequency for an audio data Jiyinzhouqi.m- for pitch period