I have put a Gym mat square underneath the machine and arched it up over the unit like a wave which is bolstered in place by my secondary pillows. The unit is on the far side of the bed away from me. I've also put a secondary gym mat square behind the first in the "wave" portion to create a short wall, like a cubicle separation. This placement of the second section helped more, but I'm still wearing ear plugs and not sleeping well from the noise. And, there is no hope of getting back into the communal bed at this point......
I'm still bothered by the noise. There is a distinct hum even when holding my breath, and of course a dissonant moan when exhaling, and, sometimes high pitched squealing which abates after slapping the machine (yes, this last statement is leaving me wide open for sarcasm and quips I know....).
I should add that I have relative pitch in case anyone can weigh in that has perfect or relative pitch too.
PS I'm not going to post the DME saga here due to possible lurkers, but it has been unpleasant.