先采集一单声道音频信号（.wav）并用WAVREAD文件采样读取，并对其进行频谱分析。分别用窗函数法和双线性变换法设计低通、高通、带通三种FIR滤波器和IIR滤波器。用M文件使信号通过滤波器并对输出信号进行时域和频域分析。-First acquisition of a mono audio signal (. Wav) files with sampling WAVREAD read, and their spectral analysis. Window function, respectiv

Matlab代码用Bilinear Transformation方法实现低通，带通，高通，带阻滤波器设计。-Using MATLAB m-file to design LP, BP, HP, BS fitlers by Bilinear Transformation method.