Resmed S9 noise problems

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Resmed S9 noise problems

Postby Russo » Sat Oct 22, 2011 4:41 am

Well i had my first night with my new resmed S9 auto. All went well except for a slight noise coming from the machine each time I exhaled. It sounds like a wheezing/whooshing/squeaking noise. If I exhaled very slowly and carefully the noise disappeared. I tried it without the humfidifier and the noise was still there. Is this a problem that anyone else has experienced?
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Machine: Resmed S9 Auto
Mask: Quattro FX
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Year Diagnosed: 1007

Re: Resmed S9 noise problems

Postby robysue » Sat Oct 22, 2011 1:41 pm

Many CPAPers are bothered by the noise of their machine. Much of the time, the noise that they find so bothersome is the conducted noise coming through the hose or coming directly from the mattress---if either the xPAP machine is actually touching the bed or if the table the xPAP is on is touching the bed. Conducted noise can magnify the sound of your breathing as it affects the pressurized air being blown into your mask by the machine as well as the sounds the machine makes all by itself. Moving the hose even slightly can help with this problem.

And what is conducted noise? All solids are capable of transmitting sound waves. It's just that we're usually not attached to a solid that is carrying sound waves in an environment that allows the conducted noise to be particularly noticeable to us. The sound waves the hose are carrying, by the way, include the sound of your breathing as well as the sounds the machine itself is making. And every inhale/exhale you make affects the flow of the air in the hose, which affects the sound of the flow of the air ....

In general, conducted noise that you notice is from sound waves that are transmitted through solid substances (the hose, your pillows, covers, body) to your head and skull, and directly into your inner ear; thus conducted noise completely avoids the usual transmission route for sound through the outer ear through the ear drum, into the middle ear, through the three small bones in the middle ear and into the inner ear. And because conducted noise gets to your inner ear without going through the outer ear at all, using earplugs to dampen or block noise can actually intensify the annoying and irritating conducted noise. That's because the earplugs fit into your outer ear and they only block the NON-conducted noise. Hence all that's left is the conducted noise, so you hear it loud and clear in all its irritating glory.

And how do you deal with conducted noise from the hose? First, try moving the hose: If it's lying on your pillow or actually touching your head---particularly the area around the back of your ears, try to move your head and the hose to minimize the contact between the hose and the pillow and your head. The hose touching the pillow is the usual number one suspect in conducted noise from the hose. (That's also part of why the special CPAP pillows with the cutouts for the mask not only help stabilize the mask and reduce leaks, but also may help with conducted noise issues.)

A simpler solution may be to give the conducted noise a bit of more pleasant competition to distract your conscious mind from the noise. In general irritating noises (be they real or nasty tinnitus) are often easier to ignore in the presence of a more pleasant auditory stimulus---such as a cd of nature sounds, other pleasant "white noise" or even quiet soft music. And note: You do NOT need to have the volume of the music/nature sounds/etc on high enough to drown the conducted noise out---no it's actually more effective in the long run if the pleasant sound is at a comfortable (quiet) level for sleeping that's just barely loud enough to give the conducted noise competition for your attention. That's all it takes to get your mind off the conducted noise--competition from a more pleasant auditory stimulus that you'd rather listen to. Then the conducted noise fades into the background and you don't notice it. The same trick works for my tinnitus by the way.

Because my husband doesn't object to it (in fact he tells me he enjoys it), I've dealt with the conducted noise issue myself by leaving my iHome on all night repeatedly looping through a very long Gregorian chant playlist playing at a reasonably quiet volume. I can't stand headphones or earplugs and I was noticing that I kept waking up when the iHome was turning itself OFF when I was using its Sleep feature. So it's better for my sleep to just leave the Gregorian chants playing all night long. And the Gregorian chant keeps my mind off the conducted noise from the hose unless I've got a migraine or tension headache brewing. But that's another issue all together.
current settings Min EPAP = 4, Max IPAP = 8 and Rise time = 3

8/1/2010 sleep study results:
AHI = 3.9 [AHI = (#OA +#CA + #H w/desat) per hour]
RDI = 23.4 [RDI = (#OA +CA + #H w/desat + #H w/arousal) per hour]
Dx: Moderate OSA
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Location: Buffalo, NY
Machine: PR System One BiPAP Auto
Mask: Swift FX for Her
Humidifier: System One Heated Humidif
Year Diagnosed: 2010

Re: Resmed S9 noise problems

Postby trebons » Sat Oct 22, 2011 6:31 pm

My Autoset does the same thing . I place the machine lower than my bed on top of couple of books between the night stand and the bed and in warmer weather i have a small fan next to the bed as well .
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Machine: S9 AutoSet
Mask: Nasal

Re: Resmed S9 noise problems

Postby CrohnieToo » Sun Oct 23, 2011 4:24 am

Yup, yup. I use both a Resmed S8 VPAP Auto and a PR SystemOne BPAP Auto. Both are usually so quiet you aren't even sure they are turned on and working. But at times I can hear the difference between inhalation and exhalation. Most of the time when that happens something as minor as just turning my head SLIGHTLY or moving my hose SLIGHTLY can turn that "sound" off. Once in a while I have to resort to actually rolling over and changing positions or reaching up to my hose and changing its position. And on occasion the steady change between inhalation and exhalation is actually soothing in its regularity and I just drift off back to sleep.
ResScan 3.10 - Resmed S8 ResLink & oximeter
ConTec CMS-50D+ oximeter - Philips EverFlo 5L Oxygen Concentrator
PR SystemOne BPAP Auto w/Bi-Flex & Humidifier - EncorePro
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Machine: Resmed S8 VPAP Auto
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Year Diagnosed: 2006

Re: Resmed S9 noise problems

Postby rednevednav » Thu Jan 05, 2012 11:44 pm

I've used a S9 for 8 months and the only time it makes any real noise is when mask is removed while airflow is still on.....or if the H5i door is not shut completely.....otherwise it is virtually silent. Perhaps a service call is in order?
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Joined: Thu Jan 05, 2012 11:10 pm
Machine: Resmed S9 Elite
Mask: Resmed SwiftFX
Humidifier: Resmed 5Hi w/ClimateLine
Year Diagnosed: 2011

Re: Resmed S9 noise problems

Postby goldbergsfg » Thu Jun 21, 2012 1:23 pm

I use the S9 and the Swift FX. The "breathe in - breath out" noise drives my wife crazy - She says I sound like Darth Vader.
I never had this problem wit the S8. The S8 was noiser and the S9 is SO QUIET that this new noise is an issue.
I fixed the problem by removing the heated tube and replacing it with a regular tube. It seems the narrower heated tube caused the air to rush faster creating the issue.
Now we are both very happy.
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Joined: Thu Jun 21, 2012 1:14 pm
Machine: Resmed S9
Mask: Swift FX
Year Diagnosed: 2006

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