matlab音频加回声

加回声[x,fs]=wavread('themass.wav'); N=10000; x1=[x;zeros(N,1)]; x2=0.5*[zeros(N,1);x]; y=x1+x2; subplot(3,1,1); plot(y); title('含回声信号波形'); y1=fft(y); subplot(3,1,2);