On 26 Sep 1996 dybala at utdallas.edu wrote:
> What about the fact that the drill could be loud enough and right
> next to the ear that it causes a loss. How long do they use
> the drill and how loud is it?
I agree that nerve damage can occur. But the ringing is really due
to correlational opponent-processing feedback from the brain trying
to control the hearing system which has been damaged. This then creates
the ringing as an opponent wave.