What I find amazing is how we don't attack the source of the problem much that I can see. Concerts, clubs, fireworks, even movies blast away above any reasonable level, causing damage to large parts of the population. We all just get progressively damaged hearing bit by bit. And yet there's very little policing of this that I have seen. It's just another form of pollution that's being imposed on people, often in public places where they haven't even had a choice (e.g., the fireworks case) or have a very poor choice (e.g., not going out with friends over this because they want to go to a rock concert).