MATLAB: RMS amplitude

Question

How can I divide a sound wave by its rms amplitude?

Answer 1

I gave an answer today that required an RMS calculation.

http://www.mathworks.com.au/matlabcentral/answers/35658-how-can-i-calculate-the-signal-to-noise-ratio-snr-of-a-signal

You can make a throw-away function for RMS:

RMS = @(x) sqrt(mean(x.^2));

And then to answer your question:

signal = signal / RMS(signal);