对于初学matlab的同学会有帮助，基于互功率谱的时延估计，有较好的参考价值，实现了对10个数字音的识别，仿真图是速度、距离、幅度三维图像，本程序的性能已经达到较高水平。-Matlab for beginner students will help, Based on the time delay estimation of power spectrum, There are good reference value, To achieve the recognition of 10 digit