sy2.m

matla窗口制作

function[new,y,Fs]=sy2(h_axes2,h_axes3,h_axes4,h_axes5,N1,mm)
if mm=1
    load chirp.mat
elseif mm==2
    load laughtar.mat
elseif mm==3
    load train.mat
elseif mm==4
    load gonng.mat
end
b=blackman(N1);
b=abs(b);
new=fftfilt(b,y);
axes(h_axes2);
cla;
t=length(y);
t=1:t;
plot(t,y,'g');
set(h_axes2,'Color',[1 1 1],'ylim',[-1 1]);
title('声音信号');
grid on;
axes(h_axes3);
cla;
p=spectrum(y,1024);
specplot(p,Fs);
h=get(h_axes3,'children');
delete(h(1:2));
set(h_axes3,'Color',[1 1 1]);
title('声音信号幅频特性');
grid on;
axes(h_axes4);
cla;
plot(t,new,'g');
set(h_axes4,'Color',[1 1 1]);
title('通过窗后的声音信号');
grid on;
axes(h_axes5);
cla;
q=spectrum(new,1024);
specplot(q,Fs);
h=get(h_axes5,'children');
delete(h(1:2));
set(h_axes5,'Color',[1 1 1]);
gird on;
title('通过窗后声音信号幅频图');