I love the idea of changing out bedroom doors. Great. I wonder if that adds to firebreaking as well.
I have several loud machines and two quiet(er) ones. The loudest is a Brother. The quietest is either a Bernina or a Janome made machine.
I've sewn right next to someone watching TV (had the machine on the coffee table) and didn't hear any complaints about it. I think some people are just sensitive to machine noise. I can relate because noisy fridges and vacuums drive me bonkers.