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声音信号的采集、加噪，再滤波[y,Fs,bits]=wavread('D:\q.wav');%读出信号，采样率和采样位数。y=y(:,1);%取单声道作分析yl=length(y)%求语音信号长度yy=fft(y,yl);%傅里叶变换t=[0:1/8000:4zeros(1,yl-32001)]';

声音信号的采集、加噪，再滤波[y,Fs,bits]=wavread('D:\q.wav');%读出信号，采样率和采样位数。y=y(:,1);%取单声道作分析yl=length(y)%求语音信号长度yy=fft(y,yl);%傅里叶变换t=[0:1/8000:4zeros(1,yl-32001)]';