They cant hear but from a study i read they sense vibrations through their jaw bones. So you could shout right next to them and it wont hurt them but theyll prolly feel the vibrations and get stressed out...
The occational vaccuuming of a room wont stress them out anymore than taking them out to hold them would. Just dont sit in the room blasting dubstep lol.
Oh god dubstep... smh, smh...