Mm - hmm.
The objection everyone always raises , which has some truth to it is that , um , it 's good for mapping from a particular noise to clean but then you get a different noise.
Mm - hmm.
And the experiments we saw that visitors did here showed that it  there was at least some , um ,   gentleness to the degradation when you switched to different noises. It did seem to help. So that  you 're right , that 's another  another way to go.