Comparing fft of wavefiles

I have to compare fft's of two wave files.What are the procedures to do so?Is there any predefined function for finding euclidean distance between two vectors in MATLAB?

Answer 1

[Wayne King]

yes, there are, but what are you trying to achieve. Do you know about coherence? Coherence is a frequency-domain measure of correlation. The values are between 0 and 1 (as opposed to [-1, 1] for the "usual" correlation). If you have the Signal Processing Toolbox, mscohere() computes the magnitude-squared coherence.

   t = 0:0.001:1-0.001;
   x = cos(2*pi*100*t)+0.5*cos(2*pi*200*t-pi/4)+randn(size(t));
   y = 0.8*sin(2*pi*100*t)+0.75*sin(2*pi*200*t-pi/8)+randn(size(t));
   [Cxy,F] = mscohere(x,y,200,100,200,1000);
   plot(F,Cxy)

The above plot clearly shows that both x and y have coherent frequency content at 100 and 200 Hz.