Audacity 2.0.6 Windows 7
I am going to generate a lot of 15 minute long files and want to extract from them a measure of volume (rms amplitude ?) at 1 second intervals in a form that I can transfer to Excel. What I need is a figure for the volume averaged over the first second, the second second and so on (to compare the sound with some other test data). I guess I could do this by hand with Compare by selecting each second manually but that’s 900 operations per test run. Is there a way to do this that can automated?
RMS will give you an approximate idea of the volume, but “loudness” is notoriously difficult to measure because it is subjective (primarily a psychological effect / sensation).
See here about loudness: https://en.wikipedia.org/wiki/Loudness