Moving Average Filter for audio

Hi! I have created my an audio file using my voice, and now I have to use moving average filter. I was only given a value of h. Ive been trying to look for other examples of MAF applied on this but theres none. I couldnt get the right output. I used conv

Answer 1

[Walter Roberson]

If you have already obtained the entire signal, then you can use movmean() if your MATLAB is new enough. However, conv() can also work well.

[Cherri Ann]

when i use y2 = conv (y, h) it shows the same output as the original. Is it right?

[Walter Roberson]

What is your h value? You would get the same output as the original if your h was scalar 1.

[Walter Roberson]

load handel
y = y(1:256);
plot(y)

ysc = conv(y, ones(1,20)/20, 'valid');
plot(ysc)

ysmm = movmean(y, 20, 'endpoints', 'discard' );
plot(ysmm)

max(abs(ysc-ysmm))

ans = 2.7756e-17

You can see that the two computation methods are equivalent.