Quiet is a relative term DH so take this with a grain of salt:

I use a sunleaves 18 watt air pump to drive 3 5" disk stones in 3 DWC buckets. I hang the pump fromt the top of the tent amd use 3/8" hose on the supply side of the pump to intake in a less traveled cooler spot on my home and Mrs P hasn't complained a bit yet.

But I do have quite a bit of "white noise" from the ventilation masking it's sound too.

M.P.