whining noise resmed aircurve

[Sleepinwell]

The only thing I can relate to this is routed tubing. I changed everything out new, hose, mask frame, mask itself, humidifier tank, still a whining noise. 

Two 90 degree bends other than the one at the machine where it plugs in.  One just below the machine and one on the frame bracket, and the swivel has to be facing up, guess that's four. Have to keep the hose above my head to prevent it from dragging across my chest and bed making a racket waking me up when I turn over.

[Sleeprider]

The Resmed Aircurve 10 VPAPs should not have a high pitched or moaning noise as pressure changes. This is almost always a warranty situation for a "pneumatic block", or the fan unit that makes noise during pressure changes. If you acquired your Aircurve through a DME supplier, they should be able to submit a claim for replacement or repair. Nearly every machine reporting this problem ends up being replaced.

[Sleepinwell]

I figured as much but I thought I'd ask, gonna call DME this week....... so bends on hose as I described wouldn't cause it?

[SarcasticDave94]

No I'd think not. It's likely as Sleeprider said, the pneumatic block issue.