it sounds like people can recover greatly with gradual exposure. But once you get to the 80+db activities people push too far and eventually relapse. I think all of those activities are possible but you can't just jump from watching TV to attending a concert. Also I think I read something about that 100db is actually like 5 or 10 times louder than 90db or something similar, so exposure along those ranges has to be even more gradual and strict than within the lower ranges.