Walkers Game Ear makes an in ear plug that amplifies soft sounds and cancels loud sounds. They look pretty cool but I am skepticle as to how much of the blast they could couteract.

Has anyone tried them... They are called Digital ITC;

http://www.walkersgameear.com/itc.asp

Oh yeah, and it costs $960 for the pair so not exactly cheap. Still wouldn't be bad to wear while hunting and if they really work it would be great to have them at the range.