You’ve extracted one sentence without the explanation as to Why. It’s not an unrealistic expectation based on the marketing, and video evidence of it running… running totally and completely silent, I might add :
If someone advertises a new 240VAC generator and shows it running in your kitchen with a magical CO filter, you’re going to assume that it isn’t deafening. Don’t get started on the word assume.
There is also the simple fact that some people are less annoyed by high-pitched, loud droning sounds. If you can read just fine while a housekeeper is running a vacuum cleaner all around you, then you might just be fine with the GF.
Room acoustic references are totally valid - the room my GF is in DOES echo quite a bit, so that is a fair critique of my situation - and something I’ve been meaning to address for some time now. Surely, that will help. As far as surrounding it with an enclosure/panels/etc: that’s for industrial equipment, to me… not the gorgeous Glowforge. The design/aesthetics of the GF are absolutely destroyed by that idea…
I have my dB meter in my hand. I’ll compare the GF to a Dyson vacuum and report back.