I hooked up the waterproof Koss headphones to the WM 08 module last night for a brief period. When I linked the module and detector together, it seems there's a mild to medium Buzz in the headphones. I must say, I have a wireless router upstairs above this room, but I did not have time to see if that is the culprit. Has anybody else experienced this? It's sort of like a loud intermittent threshold kind of sound. I will test a little more when I get home this evening.