Yep, yer all right. It's tinnitus and it can last for a looooooong time, like mine. From what I gather in my research, it's from being exposed to loud noises on a constant basis. Mine was cannon and gunfire in Vietnam and then shooting ranges during the years before good quality hearing protection was used.
I'm trying to find out who to file a claim against for my hearing loss now.
Good luck....the Hammer