I have a vent a hood. It's like a bathroom fan on full stregnth (it's HUGE at 27x58 with 1200 cfm). Ours is mounted to the rafters and wall and vents outside on the side wall (middle floor kitchen). I guess blow dryer is pretty close to it on full power. On low...I can barely hear it.

We live by an airport...it's NO WHERE near he sound of a plane taking off :) But my high tank toilet sure was!!! We have a dyson...it's not a loud as the dyson, nor the cursing done when we hit a dog bone with the dyson...

Thank you igloochic. You've done a great job describing the noise....lol