I must say that this last time I was (hypo)manic (still dx'ed 2), I did notice an intensity in my hearing. I tried to explain it to the pdoc like it was almost, Hearing in Hi-Def. I just honed in on every little sound. It was very frustrating and made me very jumpy. I couldnt just tune noises out.

Not sure if this is the same kind of experience you were having.... but I must say, my pdoc didnt seem to worried about it. Not sure if that is a good thing.