Feeling/hearing the hum of electricity through the walls, plugs, etc.
It’s not just when things are on, but if they’re plugged in at all that they make even more noise. Drove me to a point I pulled every single electric and electronic object out of my room and brought back in only what I absolutely needed after about a week.
If I could turn off the circuit breaker to just my room for a breather I would in a heartbeat, but I live with other people. Alas.