High-frequency noise coming from TV set

[pbrain]

I'm not sure if this is exactly relevant, but lately I've been noticing a weird, high-frequency noise whenever I'm around a TV set. This only seems to happen with CRT devices. I can't really remember if it was there before, and I was just wondering if anybody could enlighten me as to the nature of this noise. Thanks.

 

[Dane]

Quote:

Originally Posted by pbrain I'm not sure if this is exactly relevant, but lately I've been noticing a weird, high-frequency noise whenever I'm around a TV set. This only seems to happen with CRT devices. I can't really remember if it was there before, and I was just wondering if anybody could enlighten me as to the nature of this noise. Thanks.

Very normal. All TV sets I've heard emit a quite loud high frequency noise, could be that I've only experienced crap TVs though

 

[iq160plus]

This is High Frequency noise generated by the Horizontal deflection circuits on televsions and CRT's. The Horizontal deflection controls a coil that makes the electron beam go ACROSS your screen. The Vertical section makes it go down your screen, but is at a much lower frequency.

The noise you hear is normal if at a low volume. The little inductors (coils of wire) in the unit move a little so you hear it. If a component is very loose or defective, the noise will get pretty loud. You will know something is worng then!

 

[chadbang]

I think people here have missed the message behind this post. The fact that you're just noticing this tells me your ears are fatigued and becoming hypersensitive. Been wearing headphones a lot lately? I started noticing high frequency noise more just before I developed tinnitus. You need to give your ears some rest for a couple days before you ruin them.

 

[SunShip]

Yikes. I'm always aware of the high pitched sound of TVs. Sometimes it gets to the point of really annoying me.

 

[lini]

pbrain: That's the flyback transformer - it's almost impossible to make these thingies dead quiet for cheap, and in addition they usually degrade over time, too. What you can hear is mechanical vibration according to the horizontal/line frequency (14.something kHz for NTSC, 15.625 kHz for us PAL viewers over here). A lot of Grundigs had really lousy flyback transformers sometime between the mid 80s and mid 90s - I had to replace the one in my Grundig, too (not really a hard job to do oneself, but not recommended to amateurs due to high voltage hazards).

Greetings from Hannover!

Manfred / lini

 

[MrJoshua]

I've always been able to hear this sound (and my brother can too)... Even if I'm in another room to the TV, I can tell if one gets switched on!

 

[Edwood]

Yeah, drives me crazy.

But not anymore, all of my monitors are either DLP or LCD.

-Ed

 

[SunShip]

I guess thats one way to cure it, replace all your TV's with plasma screens and monitors with LCD

 

[pbrain]

Right. Thanks to everybody for clearing that up for me. Incidentally, I've been walking around the house with E3c's plugged into my ears ever since I got them, but not necessarily with music coming out of them. It drives my mom nuts.

 

[yblocgerg]

I've always heard this noise, its most evident when you have a RPTV that is on an input with no signal. I can tell if a tv is on from another room it is so loud to me sometimes.

 

[KR...]

I had this happen to me too

, but all my TV's are pretty low end

 

[bg4533]

Quote:

Originally Posted by SunShip Yikes. I'm always aware of the high pitched sound of TVs. Sometimes it gets to the point of really annoying me.

Same here.