Thanks for your reply. Comparison not needed. This didn't happen on prior devices, period. I may have not been explaining it well enough, but suffice it to say, the noise is in no way subtle. I've been able to identify that the loud thumping noise itself is from the two AirFit 30i mask valves closin...

I recently got an AirSense 11. After exhaling for about a second, the air pressure seems to abruptly shut off completely (not just diminish from what I can tell) before abruptly coming back on again (quite loudly and forcefully) a second or so later. This is despite the fact that both EPR and Ramp a...