While I’m very active in VOIP matters I have other interests as well, one being what used to be called “stereos” and is now referred to as “home theatre” or “audiophilia.” I’m not into the “Golden eared” silly stuff like the unbelievably expensive interconnects that so offended James Randi that he tried to call them on their bluff. But I do like to play with music playback gear.
The whole reason for bringing this up in the VOIP space is that this week seems to have brought forward the concept of “SAF” with respect to the new Snom M3s. SAF = Spousal Approval Factor.
FWIW, with respect to loudspeakers, SAF varies inversely with the volume of the enclosure.