Back when I'd sometimes be on group trips rooming with other people, the nails on blackboard thing for me was when the first thing someone would do in a hotel room was turn on the TV. Admittedly, my brother does it at his house as well.
There's nature not-silence--or a computer-generated version of same--and there's TV (or even music for the most part). Also tons of sounds in my house even if I don't put something on but mostly want to work without added inputs.