Just an update - picked up the replacement Philips Dreamstation unit yesterday. Tried it last night - NO NOISE!! Fantastic nights sleep (for me) with just one wake up at 3am for a pee. So if you have a Philips Dreamstation that hee-haws with your breathing it is defective. Get it replaced if under w...

Hi, I am new to this forum and have just found this topic which applies to me - I nearly threw the thing out of the window at 3:30 this morning. I too have issues with the two-tone motor hum that coordinates with my breathing - inhale (high note) and exhale (low note). My machine is set by the UK NH...