I would like to plot periodogram for my voice file how to do that?

Hello Seniors and Experts, I would like to plot periodogram for my voice file can any one help me that how to plot it? I want to plot for 1000 samples at windows length of 256. I have a code kindly guide me is it good way or not if not kindly solve it.

    [y,fs]=audioread('filename.wav');
    n=0:256;
    y=cos(pi/4*n)+ randn(size(n));
    nfft=length(y);
    periodogram(y,[],nfft)

Answer 1

[David Wilson]

You read in an audio file and set it to the variable y with sampling frequency fs, and then you immediately clobber it with a noisy sinusoid. Do you want to do that? I suspect not. Just delete lines 2 & 3 & re-run.

[Yasir Ali]

Yes I dont need Sinusoid noise, My wav file is five seconds I want to read periodogram for 0.5 seconds from that five seconds wav file how to plot that?