MATLAB: How to extract amplitude data from wav. file

Question

Hi, I have some wav. files of echolocation calls of bats that I need to analyze. I want to plot the amplitude as a function of time. Can someone point me in the right direction? An online tutorial would help a lot.

Thanks!

Answer 1

Doc audioread..

[y,fs] = audioread(filename);
    dt = 1/fs;
    t = 0:dt:(length(y)*dt)-dt;
    plot(t,y); 
     xlabel('Seconds'); 
     ylabel ('Amplitude');