Our Ultimaker, Replicator XL and Prusa are all very quiet printers, compared to our earlier RepRaps and Cupcakes. My Prusa sits in the room next to our den where we watch TV and I have to mute the TV to hear if it is still printing. Of course, my Prusa is metal framed, I understand the wooden ones are a bit noisier but still print very well. We just ordered a dozen frames from Joe Prusa for our next workshop.