中文说明： 这个代码用来做 ANC 筛选器。S光小学和中学的路径传输函数低通滤波器作为订单 42 至二十二岁，FIR 滤波器和次级通道估计实验重复了同样 的模型顺序错误，相同的输入的噪声和加性噪声方差。
English Description：
This code is used to do the ANC filter. Simulated the primary and secondary path transfer functions as lowpass FIR filters with orders 42 and 22, and the secondary path estimation experiment was repeated with the same model order error, the same input noise and additive noise variances.