matlab x=wavread('F:\a.wav',1024);plot(x);y=wavread('F:\a.wav',1000);a1=hamming(1000);a2=fft(y.*a1);a3=real(a2);plot(a3);z=wavread('F:\a.wav',[1,500]);han=hamming(100);En=conv(han,abs(z));plot(En);w=wavread('F:\a.wav',1024);h=hamming(1000);En=conv(h,

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