语音信号处理算法及研究

s1=wavread('Dkumar1.wav',5000);
s2=wavread('Ganesh1.wav',5000);
s3=wavread('Ganesh2.wav',5000);
s4=wavread('kath2.wav',5000);
s=[s1 s2 s3 s4]';
t=1:1:4;
a1=sign(cos(155*t));
a2=2*(sin(430*t)+sin(370*t));
a3=sign(cos(165*t));
a4=2*(sin(430*t)+cos(370*t));
A=[a1;a2;a3;a4];
X=A*S;
y = wgn(180,1,0);
figure(1)
subplot(4,1,1);
plot(a1(1,:));
subplot(4,1,2);
plot(a2(2,:));
subplot(4,1,3);
plot(a3(3,:));
subplot(4,1,4);
plot(a4(4,:));
figure(2)
subplot(4,1,1);
plot(S(1,:));
subplot(4,1,2);
plot(S(2,:));
subplot(4,1,3);
plot(S(3,:));
subplot(4,1,4);