a couple of months ago, i have heard very loud smartphone notification sounds in my room at night, only for one night. it sounded like it was right next to me, but my phone is mute as usual, and no other electronics that could emit sound were on. (i dont have a smoke detector, robber alarm or anything). its just really weird.
and today my mom said she heard voices, like from a phonecall coming from my room, although I didn’t hear anything. and when i went to the living room to talk to mom, she said the voices stopped (fyi, my mother is mentally and physically healthy, isnt drunk at the time, so that could not be hallucinations, or a prank since she wasnt the kind to prank n stuff).