The application I'm working on unfortunately has a significant losses in the low frequencies. Using an audio spectrum analyzer I can however detect the peaks of the harmonics in the frequency spectrum. I would like to use those to recreate the fundamental frequency to a greater accuracy. Since the harmonics in the non-troublesome region attenuate according to certain (yet to be determined) equation, I should be able to find the solution to the frequency that occurs at maximum in the troublesome band that is causing the losses.
I know there could be solutions for my problems with avoiding the losses in the first place, but I'm really interested in exploring the possibility of recreating the original signal from the harmonics.