I am studying underwater footage of fish for the summer, recorded on go-pros, and am interested in the average sound intensity (in decibles) for each minute of each video (each video is 8 minutes total). The files are currently in mp4s. I have another program that will show me an audio visualization of a waveform in (decibels), and I will read a instantaneous sound intensity at any point, but I can’t find a way to get an average of these points for over period of time without writing down the decibels by hand for every instant and then averaging them all in excel, or playing the videos outloud for an app on my phone which records average sound intensity (but it is finicky and introduces a lot of error, so I’m trying to find another way). It doesn’t seem like that difficult of a task, all I want is the average “relative loudness” for each minute in each video, but I’ve been scratching my head as how to get these data. (I am using a windows 7)
Is there a feature in Audacity that would allow me to do this? Or can I somehow convert a sound file into some other format that displays the amplitude/sound intensity at each instant, so I can copy and paste them into excel or R to get an average?
I appreciate any help! Thank you!