However my wife has told me a couple of times she heard it making a loud "motorboat" noise during the night. Last night I finally heard the noise. I was awoken by a "motorboat" like rapid putting noise. I could feel it in my nasal pillows and felt the air pulsing. I just exhaled quickly and the noise immediately stopped and I fell right back to sleep.
This morning I looked at the SleepyHead report on last night. I saw 2 unusual things. One period of Cheyne Stokes,(I have no heart problems and have only had these show up on 2 other nights). Then there was a strange group of Snore activity for less than 5 minutes about an hour before I woke up.
I am not sure what was causing the noise. It felt like it was air pressure into the pillows pulsing causing the headgear to "rattle". Of course being just roused out of sleep who knows what the cause was. It was definitely coming from the pillows unit and not the machine. Was the machine causing it? Maybe I will find out later what is causing this.
Anyone else had this experience?