acoustic emission cumulative energy

I am beginner user of MATLAB and working on acoustic emissions. I want to ask that how we can find the acoustic emission cumulative energy of an recorded audio file or signal?

Answer 1

[Chunru]

% signal
amp = sqrt(2);
f0 = 100;
fs = 1000;
% simulated signal (replace it with audio file)
x = amp*sin(2*pi*f0*(0:1/fs:5)');

dt = 1/fs;
% cumulative energy (not sure your definition of the term)
y = cumsum(x.^2)*dt;


subplot(211); plot(x);
subplot(212); plot(y); grid on