Does it make a sound sort of like a bellows when you take a breath or does the sound stay the same. Mine changes sound sort of like it is slowing down and speeding up when I take a breath. Kinda has me worried.


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REMstar Auto M series with A-Flex and humidifier. Plus an O2 concentrator

Mine is a RemStar Pro M series cpap with Cflex and it does vary in sound on inhale and exhale. Matter of fact, sometimes it has a slight whistle on inhale which drives me CRAZY and I'm not able to isolate the problem and fix it. Last night I turned the Cflex down to 2 from 3(which is highest setting) and I swear it was much better. I'm not sure but I think I slept in the same position all night. No disturbances or anything. I think I'm going to leave it on 2. Only problem is my shoulder is sore from sleeping on my right side all night. But the sound was more level too.


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Respironics REMstar Pro w/C flex and humidifier

Pressure 9 H2o, C flex 3, Humidifier 2

Resmed Activa LT size small mask

tralalara wrote:

Mine is a RemStar Pro M series cpap with Cflex and it does vary in sound on inhale and exhale. Matter of fact, sometimes it has a slight whistle on inhale which drives me CRAZY and I'm not able to isolate the problem and fix it. Last night I turned the Cflex down to 2 from 3(which is highest setting) and I swear it was much better. I'm not sure but I think I slept in the same position all night. No disturbances or anything. I think I'm going to leave it on 2. Only problem is my shoulder is sore from sleeping on my right side all night. But the sound was more level too.

Thanks, that makes me feel much better. I have so much white noise in my bedroom that I had never really heard the thing until the otherday when I had the mask on and the machine running witout noise.
I can see why the sound drives some people crazy


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REMstar Auto M series with A-Flex and humidifier. Plus an O2 concentrator

I'm so glad someone asked this question.  I also have a Rem Star Auto M Series - AFlex machine and the 'noise' from it has had me wondering if it was working properly.  During the Summer months I had a fan going in our bedroom and so I didn't hear much if any of the noise.  However now that the weather is getting colder I don't have the fan going so I notice the cpap machine noise a LOT more.


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Rem Star Auto M Series A-Flex
Res Med Swift LT for Her
13.0 cm H2O