I agree, it's not the pump itself but rather significant amplification of what little pump vibration there is to the point where it does become quite noticeable. :M The only reason I swapped out the Artis pump that originally came with my Coachmen was that I was gifted a brand new SHURflo Revolution so I now use the Artis as my
Fresh Water Transfer Pump and used as such it's barely audible when running.
There's really no need for a forum search on the topic as the answers have already been provided here - isolate the pump, prevent the input / output lines from contacting cabinet walls, etc, and
significantly extend the length of the output hose with soft wall potable water hose and one would be hard pressed to hear the pump operating at all. :B