What is the sound I am hearing Has anyone heard of anything like this
I've been curious about what this sound is since I was a child. I am not quite sure what I am hearing (but I am guessing EFI), but I hear a type of sound when a TV is, and yes, it can be on mute or just displaying a blank screen (more so with the old school CRT tvs, most plasmas, and some LCD TVs), the same with computer monitors (mainly CRT but some LCDs), and even some other electronics.
What is the sound I am hearing? Keep in mind all the devices have to be on for me to hear it.
The funny thing I am actually unable to use certain air fresheners, because they emit the same sound expect in such a high pitch it drives me crazy, it almost feels like it will make my ears bleed when i use these oddball air fresheners (that require AC power)
Answer:the sound you hear is normally from the flyback transformer in the television to drive the picture tube.
"There are several parts inside the TV that can potentially make this noise. These include the horizontal flyback transformer, deflection yoke, other transformers, even ferrite beads in the horizontal deflection circuits. In addition, transformers or chokes in the switching power supply if this is distinct from the horizontal deflection circuitry. Or even a portion of the sheetmetal used for shielding if in close proximity to a magnetic component. "
high freqency sound eminated from all kinds of electrical things, even some lights. it will drive you nuts if you let it. get rid of the gas filled bulbs and any electrical things you dont need on, turn them off. if the sound is on that will mask a lot of the freqency squeel so dont sit there with them on but not making the sound they are meant to.
I just thought that everybody heard the hum of the electricity in the cathode ray tube (CRT). But I grew up in the 50s when the sound was much louder in tubes manufactured then. I remember that there were other types of tubes for radios & TVs and I used to play with them in the tester at the store to hear the different hums. My mom would say, "doesn't that one have a nice sound? Try this one, and what about that one?"