FWIW it doesn't beep beep beep it just whirs all inght - you can hear the blooming thing blowing air.

My DF has had his for 2.5 years and used it once. It seems they didn't adjust his to what it was supposed to be and we can't afford to go back for another sleep study. His is a resmed. And yeah it's a turn off, but what can you do when it's your life we're talking about.