RE: Background noise between original Convoy and a Convoy 2. Activated the Convoy 2 not too long ago for my husband to use. Since that time when we talk I hear a loud roaring type sound on my end ONLY when he and I talk to each other. Usually when he's driving but sometimes while not. He doesn't hear it on his end, and when I am talking to friends , I do not hear it. It seems to just be between the two Convoys. Anyone have any idea what this is? If it can/cannot be fixed? TY