Inmate, Please talk to an audiologist and they can explain why you should NOT be using the Naidas. It would be like lighting candles on a birthday cake with a blow torch IMHO. As many of us on this board have learned louder is not always better! You would be better off doing what ever you can to keep as much of your natural hearing as possible.
My audi once let me know about this saying in case I travelled to be careful and just have my receivers and just ask for an FM where you go cuz if its a tourist spot they usually have FM...or loop system or something ...dont want ya to get in trouble over something small like that..