[rheavn]

I'm using a Inficon Whisper and have been very successful in finding my air leaks. I've been using the earphones that came with it with no problems. Tom bought one and was not pleased. Sounds like Richard has found using ear muff earphones has made his more useful. I'm going to try them. If you google ultrasonic leak tester or Inficon Whisper you'll find them. I'm on iPhone so don't know how to insert link. I did notice that the price has gone up.