[Jaan]

I've always been able to hear that in some electronics too. I guess I've learned to tune it out for the most part, but sometimes it's still too much.

Western Digital hard drives made from around 1999-2002 create a high pitched noise that just rubs me the wrong way, like fingernails on a blackboard. I fix a lot of older computers and I can tell a Western Digital drive a mile away. I don't bother looking anymore, I'm always right. To me it's as distinctive as the rumble of a V8 (one of the most pleasant sounds there is).

Coil whine is another thing that I hate. A few computer power supplies have coil whine. Sometimes you can get rid of it by moving around power connections, sometimes you cant. I had to get rid of a nice Antec power supply because of that.

When I was little, our black and white tube TV had a remote control that worked with ultrasonic frequencies. A little hammer inside hit a tuned bar of metal for each control...a true "clicker". I was the only one who could hear the frequencies. An interesting fact about those old TV's...when rain hits a window, sometimes it makes the same sound as the remote did for "power on". A lot of people attributed that to ghosts and spirits. There would be a bad thunder storm, and all of the sudden the TV would turn on and freak people out.