Well it happens, many get temporary tinnitus after a going to a gig. How often it happens is probably under reported. People don't go thier ENT to report they are cured or jump online on a tinnitus forum to tell people about it.
However if you hold this as your goal, you are more likley to be dissapointed with every day it is here. However if you make your goal habituation, every passing day can bring you closer to that goal. If your tinnitus dissapears on the way to your goal by itself, well that's just great.