Tried that. Guess it could work. But are you really _safely_ overloading the hearing apparatus? To me it's just another way of activating the eardrum, doesn't make it safer per se.
I am no authority to answer that question. IIRC ears can handle quite a bit of loud noise and protect themselves some way. The problem arises with long duration noise stress. Please look up this method for more info, to be confident and safe. I am sure your concerns have been addressed before.