Uh , this is uh energy , log - energy of the spectrum. Of the this is the variance , the difference  between the spectrum of the signal and FFT of each frame of the signal and this mouth spectrum of time after the f may fit for the two ,
For this one. For the noi
this big , to here , they are to signal. This is for clean and this is for noise.
Oh. There 's two things on the same graph.