Mm - hmm. Mmm.
and  Actually it was not a threshold , it was just adding noise.
Mm - hmm.
So I was adding a white noise energy , uh , that 's fifteen DB below the maximum energy of the utterance. And  Yeah. When we look at  at the , um , MFCC that result from this , they are  a lot more smoother. Um , when we compare , like , a channel zero and channel one utterance  um , so a clean and , uh , the same noisy utterance  well , there is almost no difference between the cepstral coefficients of the two.