I recently purchased a set of waterproof headphones for the ATP. I found the tones to be different from the standard issue phones. The tones are tolerable in volume and pitch but are in my opinion different. Has anyone else found this to be true? I think I'm also hearing alot more signals with the waterproofs. I hunted and iron infested area yesterday and was getting almost constant iron grunts. I managed to find one wheat,one IH,a 41 Jefferson and a new penny and clad quarter, and a vintage military police button.