Had this problem at highscool, I could tell if the TV mounted in the room ceiling was on even if the screen was black. I had to ask the teachers to turn them off, they’d look at it and say “it is” and then we’d have an argument about not being able to hear anything. Eventually I would prove it by turning away, and having them randomly turn it off and on and I could tell them when it was off vs on.

Very frustrating, but I got old and now I can’t hear shit