Well, my first guess would be tintinitis, what happens to many of us old guys, especially those who worked in noisy environments. TV used to have a real bad high pitched whine. 'Bout drove me crazy to walk past a display of tvs in a department store. Dont't know if they do still, or if I can't hear that high anymore. New technology has changed how the picture tube is powered. As far as the flourescents, they run at line frequency, 60Hz - most can't hear that low. Led lights if run all in one direction, would have a 60hz flicker, because they would be running on only one side of the ac sine wave, since they are diodes. However, I suspect they are made to run on both sides of the sine wave, to eliminate the flicker. My dad used to tell when they changed from 30 cycle to 60 cycle (they called them cycles back then), Said you could actually see the flicker in lightbulbs at 30 cycles. When they switched, the clocks ran twice as fast!
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Today's Featured Article - Listening to Your Tractor - by Curtis Von Fange. Years ago there was a TV show about a talking car. Unless you are from another planet, physically or otherwise, I don’t think our internal combustion buddies will talk and tell us their problems. But, on the other hand, there is a secret language that our mechanical companions readily do speak. It is an interesting form of communication that involves all the senses of the listener. In this series we are going to investigate and learn the basic rudimentary skills of understanding this lingo.
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