I can hear whether they were on or off, and whether they were tuned to a signal or not. A video signal synchronized up has a very distinct profile, and people

I can hear whether they were on or off, and whether they were tuned to a signal or not. A video signal synchronized up has a very distinct profile, and people who can hear about 15 khz can hear the sync signals modulating the higher frequency component. I could at one point, adjust horizontal and vertical hold to a stable signal eyes closed. Some sets were very loud, and I could hear them rooms away. Walking The Halls in my primary school, I could walk by the classrooms and say they have a TV on oh, and nail it a hundred percent every time.