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Power spectral density of voice recording

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Hello
I have recorded a voice with sampling frequency and other parameters. Now, I want to find out the power spectral density for that. In order to find that, should I use the pwelch function, or is there any other technique?
I'm writing the code below:
clc;
clear all;
voice= audiorecorder(22050,8,1);
disp('Start recording'); %To start speaking
recordblocking(voice,5); %Stops the recording after 20 seconds
disp('End recording'); %Message displays end of recording
a= getaudiodata(voice); %Gets the data of voice signal and stores in a variable 'a'
%figure;
%plot(a); %Plots a graph of the voice signal
title('Audio signal'); %Title of the voice signal
xlabel('time in sec'); %X-axis
ylabel('Amplitude'); %Y-axis
b=pwelch(a);
plot(b);

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Accepted Answer

Image Analyst
Image Analyst on 11 Oct 2019
Yes, pwelch() is fine. That's what I'd use.

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