说明：  LMS滤波器其在回声消除中的应用，也可用于去噪，代码已运行过，无错误，大家放心使用，可用用作毕业设计参考，里面还有个小惊喜，也是代码
(The application of LMS filter in echo cancellation can also be used for denoising. The code has been run without error. You can rest assured that it can be used as reference for graduation design.)