I have quite basic knowledge of mathematics.
Consider two axis, time and dB (sound levels).
My question is if it's possible, using fourier or any other method, to find how many occurrences of specific dB values in a row exist.
For instance I want to find how many times the dB sequence 20,40,60 exists.
Sorry if I don't make sense !! :)
You can just search through the file. Go through until you find a $20$, then see if it is followed by $40,60$ and count $1.$ If it isn't, go back to looking for $20$'s.