Looking for the noise specs on the standard gear motor ROB12367. Motor will be running for several hours at a time in a location that requires that it be extremely quiet.
Unfortunately, that isn’t something we have data on (from the manufacturer) or could easily measure. There seems to be an old forum post that might be useful:
I don’t have specs, but having used these before, I can say they are pretty quiet. If you’re careful how you mount them, they should be nearly silent. 