Resmed or System One

I have a Resmed 9s. At the end of each exhale there is a slight whistling noise, Has anyone experienced this noise in the System One?

Very occasionally I hear that from my System One, and when it does happen it usually doesn't last very long. I have no idea what causes it, but it doesn't happen often enough to be irritating to me, and my wife has never mentioned it so far.

turner wrote:I have a Resmed 9s. At the end of each exhale there is a slight whistling noise, Has anyone experienced this noise in the System One?

If you're using EPR, try a different setting or turning it off.......and see if the sound changes or goes away.
Also, check for air leaks.


Den

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This noise has been mentioned several times in posts. Many S9 users (including myself) have noticed the exhale whistle. Noone seems to know what it comes from. It it so slight that it's easy to ignore. Don't know about the System One.