- Jun 19, 2018
There's not a short answer. To some extent, constant delay (let's call it that, linear phase is kind of misleading) is important, but it doesn't have to be exactly constant delay. Phase inversion in some frequencies matters, in others it does not as long as it doesn't change the signal envelope.
There is a lot to be said, but it requires a blackboard and time.
A look at binaural masking level depression might be a starter even though we are talking here about monaural issues.
Thanks. Have you written on this in more detail elsewhere, perhaps?