www.pudn.com > spectrogram_analysis.rar > yuputu4.m

 
%%%%ÓïÆ×ͼ2 
%%%%tm=len_x/fs; 
%%%%axis([0 tm 0 fs/2]); 
 
clear all; 
close all; 
clc; 
 
 
for i=0:11 
     
    switch i 
        case 0 
            file='0.wav';figure(1); 
        case 1 
            file='1.wav';figure(2); 
        case 2 
            file='2.wav';figure(3); 
        case 3 
            file='3.wav';figure(4); 
        case 4 
            file='4.wav';figure(5); 
        case 5 
            file='5.wav';figure(6); 
        case 6 
            file='6.wav';figure(7); 
        case 7 
            file='7.wav';figure(8); 
        case 8 
            file='8.wav';figure(9); 
        case 9 
            file='9.wav';figure(10); 
        case 10 
            file='10.wav';figure(11); 
        case 11 
            file='1y.wav';figure(12); 
    end 
     
     
[x,fs,p]=wavread(file); 
len_x=length(x); 
x=filter([1-0.9375],1,x); 
 
len=150; 
lenshift=30; 
y=enframe(x,len,lenshift);   %% 
 
[m,n]=size(y); 
 
for i=1:m 
    fft_mag=abs(fft(y(i,:),n)); 
    yupu(i,:)=fft_mag.^2; 
end 
 
s=max(yupu); 
ss=max(s); 
 
yupu2=yupu/ss; 
yupu3=yupu2(:,1:len/2); 
 
imshow(yupu3',[0 1]); 
 
title(file); 
 
xlabel('t/s'); 
ylabel('f/Hz'); 
 
 
end