I dove last weekend with the aeris ai 500 for the first time.. I had the sound on and decided to test it.. purposely I set a few alarms off but I did not hear anything.. I know the alarms went off because a couple of things were flashing on the console (the things that were supposed to be flashing of course).. on the surface when the computer boots up I can hear a single beep but it's very soft.. I was diving wearing a 7mm suit with a hood.. does this seem normal or maybe my computer is defective? thanks