We tried uh things which uh a long time ago Bill Byrne suggested , instead of using Fourier spectrum , from Fourier transform , use the spectrum from LPC model. Their argument there was the LPC model fits the peaks of the spectrum , so it may be m naturally more robust in noise. And I thought " well , that makes sense , " but so far we can't get much  much out of it.
Hmm.
uh we may try some standard techniques like spectral subtraction and
You haven't tried that yet ?