"....said it went away after 50 hours or so of use."

I wonder if that was psycho- achoustical?

or an auditory adjustment in the brain?

I did a little perception in U.C.O. a sa philo major....pshyco acoustics...man it was very very tough...as if visual information wasn't hard enough...just the auditory seems a little more abstract.

dave

"There is one thing that I know for sure, and that is that I know nothing." ...Socrates