How to calculate the RMS for every 441000 values of an acoustic signal of length 13,230,000 using MATLAB?

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Kwaku Owusu on 13 Oct 2020

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Commented: Ameer Hamza on 13 Oct 2020

Hello, I have 5 minutes recorded acoustic signal with 13,230,000 data points and I would like to know the root mean square (RMS) of every 441000 values (equivalent to 10 sec). Please, do I need a loop for this? Or is there some easier way to solve this?

Thanks in advance!

Kwaku

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Ameer Hamza on 13 Oct 2020

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Edited: Ameer Hamza on 13 Oct 2020

Open in MATLAB Online

sig; % 13230000x1 signal
sig_part = reshape(sig, 441000, []); % partitioned signal, each column is a partition
rms_sig = rms(sig_part) % if you have signal processing toolbox

If you don't have the signal processing toobox, then replace the last line with

rms_sig = sqrt(mean(sig_part.^2))

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Kwaku Owusu on 13 Oct 2020

Thank you very much Ameer Hamza.

Ameer Hamza on 13 Oct 2020

I am glad to be of help!!!

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