Right , the word " stationary " is  has a very precise statistical meaning. But , you know , in  in signal - processing really what we 're talking about I think is things that change slowly , uh , compared with our  our processing techniques.
Mm - hmm.
So if you 're driving along in a car I  I would think that most of the time the nature of the noise is going to change relatively slowly. It 's not gonna stay absolute the same. If you  if you check it out , uh , five minutes later you may be in a different part of the road
Mm - hmm.