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/vr/ - Retro Games

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2485382 No.2485382 [Reply] [Original]

/vr/ what causes some CRT's to let out a high pitch squeal when they turn on? Most people can't hear it, but it sounds like a super high pitch whine when I turn on my old CRT. It's super annoying and feels like someone is ear fucking me.

Is there any way to fix this or should I just get another CRT?

>> No.2485401

>>2485382
I used to think I was hearing things, other people did too until I could tell them when the TV was on without hearing or seeing it. There was an old PC that was so bad I had to leave the room.

Does anyone experience this but me? Do I have fucking dog ears or something?

>> No.2485478

>>2485382
Get worse ears.
I'm no expert regarding CRTs, but the sound is made by the heating of the coil.
Since most CRTs run signals in 15kHz, it is in the audible range (20Hz - 20kHz). The range gets smaller the older you get.
You could have just asked /crt/.

>> No.2485571

Flyback transformer.

As they get older they get a bit louder. As WE get older we get a bit deafer to high frequencies. When I was a kid I could tell if my dad had left the TV in even if the volume was off, now I can't or maybe I'm just used to hearing it all the time since I always have CRTs on.

As the CRT warms up it quiets down plus your brain should automatically tune it down. Cheap CRTs are worse about it and CRTs with shielded cases like PVMs are barely audible but it is still there.

>> No.2485620

Try giving it a whack though it never worked long term for me.

>> No.2485776

>>2485382
I always hated that noise. I could hear it from the TV in the living room while I was in bed with the door closed. I asked my family if they could hear it, and no one else could; not even my younger sister.

>> No.2485852

>>2485478
Hadn't thought about that. Apologies.

>>2485478
>>2485571
>>2485776
Thanks for the info. At least I know I'm not nuts now.

>> No.2487706

Hear the same thing from my crt tv and it annoys me. Quitens down after 15 mins or so. Interestingly I hear something similar when charging up my galaxy tab 2

>> No.2487727

>>2487706
>charging up my galaxy tab 2
Same. I hear it from most phone chargers also, and my Kobo charger too. I haven't used a CRT in years, but I could be in the living room and be able to tell when my parents turned on a TV in their room even with the volume off.

>> No.2487747

>>2487706
>>2487727
Probably when the transformers in the chargers get up into the 2 amp range they start emitting frequencies low enough for some people to begin detecting.

>> No.2487756
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2487756

>>2485382
>the horrible screaming
I think it's coming from next door.

>> No.2487783

The owner of my local arcade told me the same as >>2485478 : it's more or less because of the power going through the coil(s?).

Even though I hate that noise, I'm glad I can still hear it at 29y.

>> No.2487792

My old TV used to make that noise too. My advice is just learn to live with it.

>> No.2487798
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2487798

>>2485382
Read up on https://en.wikipedia.org/wiki/Coil_noise bro

Your inductors get put under mechanical stress caused by magenetic fields each time the current changes inside the 'ductor. Old TV's inductor housings have loosen overtime, and vibrate a little with audible frequencies sometimes.

TVs have tons of oscillating circuits, and inductors are one of the key elements of constructing and fine tuning these types of circuits.

Pretty much, ya fucked. Ain't nothing you can do.

>> No.2488151

>>2485382
>>2485401

>i don't hear anything, anon.
>are you sure you're feeling alright?

but it's mainly when the TV's either muted or receiving no signal on the selected input, no? it's normally drowned out by average level volume.

>> No.2488180
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2488180

>>2485401
>had to leave the room
>Does anyone experience this but me? Do I have fucking dog ears or something?

>> No.2488231

>>2485382
>>2485401
>Most people can't hear it,

I always fucking heard it

iktf

>> No.2488243

I also hear it, but I stop giving a fuck after about 30 min of watching.

>> No.2488689

>>2485382
It's the sound of the souls of thousands of emufags who use scanline filters being dragged to hell.

>> No.2489185

>>2485382
The frequency of the whine is the resolution times the frame rate, so NTSC is 525*30/1.001 = ~15734kHz and PAL is 625*25 = 15625kHz. The majority of people only hear up to about 16kHz (22kHz is a theoretical maximum) and so it doesn't bother them.

>>2485776
I still hear it and I'm 24.

>> No.2489229

I hear this when a CRT first turns on for sure, but it fades into a very very faint whine for me within a few seconds... It's negligible after that, I'd have to turn the volume down and put my ear near the casing to really notice it. I'm 21... Kinda makes me concerned for my ears.

>> No.2489256

>>2489185
I can still hear it and i'm 40. But it's never really bothered me, perhaps because I grew up with it.

>> No.2489593

>>2489256
32 and I think I'm actually more sensitive to it now than when I was a kid. Might just be because it's less common these days, though.