My Replacement Dreamstation ASV is a little Noisier Than Absolute Quiet

[GearChange]

So on my first nigh trying out my new replacement ASV machine, I noticed that I could hear the blower, especially when the machine increased the pressure to over 10 cmH2O on backup breaths (Yes I deliberately hold my breath a few times before falling asleep, to make sure the machine will do as programmed).
Anyway, my old machine has little to no noise when clocked with a Decibel Meter app on my smartphone. In fact it measures a mere 25 db in my bedroom, which is pretty much as quiet as it can get, outside of a studio grade sound proof room.
So I measured my replacement machine and noted that it goes up as high as 37 db, which is still at whisper level, but nevertheless audible, to my ears anyway.
My theory is that this noticeable noise difference has to do with Respironics choice of the new sound-abating foam which they use in their replacement machines, one that does not disintegrate when exposed to Ozone generating cleaners. The foam must be made with a less dense material which does not do a great job of suppressing the noise generated by the blower.
The replacement is still slightly quieter than my Resmed Aircurve 10 ASV which clocks at about 40 db when blowing over 10 cmH2O, part of the reason why I prefer my Dreamstation machines to my Resmed machines.
How about you? Do you notice a noise difference with your replacement DS?

[ChicagoGranny]

You didn't ask for suggestions, but why don't you use a white noise device? I use an app on an old cellphone.

[palerider]

(Yes I deliberately hold my breath a few times before falling asleep, to make sure the machine will do as programmed).

Why would you doubt it?

one that does not disintegrate when exposed to Ozone generating cleaners.

Oh, ALL foam disintegrates with exposure to ozone, the old foam just disintegrated *on it's own*, ozone just made it fall apart faster. That's what you get when you cut every corner possible.

The replacement is still slightly quieter than my Resmed Aircurve 10 ASV which clocks at about 40 db when blowing over 10 cmH2O, part of the reason why I prefer my Dreamstation machines to my Resmed machines.

Interesting, Resmeds are normally quieter than Respironics, across the board.