[CPAP] AirSense 10 beep or ding sound

[Baklash]

I am new to ResMed and this forum. I have a new AirSense 10 for less than a month. Last night, as soon as I went to bed, for the first time ever it made a high pitch beep or ding sound every few seconds but only when I breathed in or exhaled, even if I did so very lightly. If I held my breathe it didn’t sound. It has never done this before even when I had a mask leak. Finally stopped, but I am not sure how. Somewhere, I had heard or read something about a sound occurring if you were breathing hard. However, I was breathing normally. What causes this, and if it happens again how do I stop it? It was very annoying and kept me from going to sleep.