this post was submitted on 09 Apr 2025
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[–] AlolanYoda@mander.xyz 131 points 4 days ago (19 children)

I can hear CRT screens. They emit a high pitch noise that nobody else in my family can hear, I assume most people actually can hear it but never noticed it. My family used to think I was crazy or had tinnitus (jury's still out on both) until they tested me by making me close my eyes and tell them if the TV was on while turning it off and on at random, with sound off. It was a weird test from my perspective, since I could hear it fine anyway. So far I haven't noticed a decay due to age, but if it had little use when CRTs were widespread, it's now completely useless.

[–] Spendrill@lemm.ee 88 points 4 days ago (3 children)

I used to be able to tell what refresh rate they were set to because everything below a certain point flickered. I'd ask people why their screens were flickering and they couldn't see it.

[–] tetris11@lemmy.ml 40 points 4 days ago* (last edited 4 days ago) (3 children)

Now that is a superpower. I've always thought the ability to see fast was such an interesting skill.

Think about it: you could go to the Olympics in a skillful sport like fencing or boxing, and defeat every opponent without much formal training simply because you can see them telegraph their moves. No anticipation or planning required, you just watch them come to you.

Do you do any competitive sport?

[–] VivianRixia@piefed.social 50 points 4 days ago (2 children)

Though just because you can see such fine movements doesn't mean you can react fast enough to stop it. You'd just see your loss coming from a mile away.

[–] jballs@sh.itjust.works 27 points 4 days ago

"awww shiiiiitttt I'm about to be punched in the face"

...

...

...

"Ouch!"

[–] tetris11@lemmy.ml 7 points 4 days ago

True, but with some training you'd learn to anticipate as well. Pairing that with your Uchiha eyes, and you'd be unstoppable

[–] sp3tr4l@lemmy.zip 11 points 4 days ago

I used to be able to do this as well until I got into my 30s and my vision naturally degraded.

Was quite good at FPS games, paintballing... the first time I went to a rifle range for an introductory shooting class, the instructor suggested i look into a shooting scholarship due to my exceptional fine motor control and visual acuity... I had very fast reaction times in martial arts (Karate), but being naturally timid and having a skinny twink build kind of cancelled that out.

The reality is most people think you are delusional, and if your family/friends are authoritarian, they'll try to get you mentally evaluated as seeing hallucinations.

Its less Superman and more Xmen being persecuted for being different.

[–] Spendrill@lemm.ee 5 points 4 days ago

No, I have very poor hand eye co-ordination. Every time I have tried to play table tennis people have been on the floor laughing at how poor my reactions are. My eyes are just very sensitive to light.

[–] SkunkWorkz@lemmy.world 7 points 4 days ago (1 children)

When I lived in Canada for a year and then moved back to Europe I saw CRT TVs flicker for the first week I was back home. Even on so called 100Hz CRT TVs I saw flickering. Got used to 60Hz CRT screens so 50Hz CRTs were very noticeably

[–] Spendrill@lemm.ee 8 points 4 days ago

Yeah, if my memory is correct the flickers stopped completely for me at around 80hz. I'm talking about monitors here rather than TVs.

[–] x4740N@lemm.ee 4 points 4 days ago* (last edited 4 days ago) (1 children)

You might want to get yourself checked for Autistic Spectrum Disorder because I notice CFL tube (fluorescent tube light) flicker if I pay attention to them when no one else does

Some people with ASD are more sensitive to things other people don't notice

[–] Spendrill@lemm.ee 2 points 4 days ago

Mate, there are so many things that suggest I am on the spectrum now that I have given up keeping track of them all. I'm not sure that at my time of life there's anything that can be done for me even if I did get a diagnosis.

[–] chaosCruiser@futurology.today 26 points 4 days ago (1 children)

Try that with cheap mobile phone charges. They have an annoying coil whine.

[–] AlolanYoda@mander.xyz 8 points 4 days ago

... Wait. I assumed it was my extension cord keeping me up at night. I just learned to use it as white noise.

I swear my therapist says she sees no reason for me to be diagnosed as autistic

[–] sp3tr4l@lemmy.zip 19 points 4 days ago (4 children)

I too have significantly more sensitive hearing than seemingly just most people, and can hear and often get annoyed by high pitched but low decibel sounds, very often caused by electronics, off balance high speed fans, etc.

Got gaslit about it by my family as well.

You may wanna look into an autism diagnosis, autists often have this kind of thing going on.

You'd think it would be called super hearing, but instead its often everyone without heigtened senses calling you delusional.

Same thing happened to me when I described seeing the entoptic blue field phenomenon to my family, but not knowing the fancy name for it because I was 11. Family got very concerned I was hallucinating, the reality is I am just more attentive to reality than they are.

[–] quediuspayu@lemmy.dbzer0.com 9 points 4 days ago

So that has a name! Hahahaha There's no way I can memorise that, I'll keep call it "eeenergy" instead.

Good to know what it is in case someone wants a serious answer.

[–] TexasDrunk@lemmy.world 7 points 4 days ago (1 children)

My brother and I always enjoyed going out to the woods together when we were young because you couldn't hear everything humming out there. I still enjoy it for the same reason.

My hearing isn't even that great because I've spent years around loud noises (industrial and concerts) without hearing protection. But I can still "feel" cheap chargers, bad screens, and florescent lights.

[–] sp3tr4l@lemmy.zip 6 points 4 days ago

A whole lot of poorly configured or cheaply made electroninc appliances or chargers ... yeah I can often literally hear when you've plugged something in wrong, it makes a high pitched whine, because it is overamping.

Also, if you're near high tension power lines?

You have to be pretty darn close to be in danger from actual electromagnetic effects.

But... that hum? The buzz?

Turns out that that is actually what causes a lot of long term health problems in people sensitive to it.

Literally the sound, not the EM field, makes you agitated, stressed, on edge, and if that is just your baseline for 20 years, that constant stress accumulates and basically ages you faster, and can cause mental health problems.

[–] nargis@lemmy.dbzer0.com 3 points 3 days ago* (last edited 3 days ago)

entoptic blue field phenomenon

Thank you. You've solved a mystery that bugged me since forever lol. Yay, I am not crazy. I legit thought there was something wrong with my eyesight all these years, or that they were just weird floaters. Thank you so much, friend. Relate hard to the sound stuff as well, it's nice to know it happens to other people al well.

[–] AlolanYoda@mander.xyz 7 points 4 days ago (1 children)

Out of all the ways I've ever been told I may have autism, this is certainly the most unexpected! At a certain point I should probably get a diagnosis.

In my family's defense, they did believe me as soon as they tested my hearing (after trying to trip me up several times, without success), so I never felt gaslit, I just felt proud of my hearing hahaha.

Yeah, I didn't mention this in my previous post but it was annoying, for sure. I would listen to this annoying noise, nobody would hear it, and I'd eventually discovered that somebody had left the TV on.

That phenomenon is also something I saw, but never really gave it much thought, I just assumed it was just something our eyes did

[–] sp3tr4l@lemmy.zip 4 points 4 days ago

Well I'm glad you have/had a supportive family instead of a dysfunctional awful one like me.

I've been forced through an ever evolving series of mental health diagnoses by my family until after 20 years of the wrong meds for misdiagnosis... yeah turns out I am autistic and have ptsd/cptsd from my insanely narcissistic and manipulative and mentally unstable family.

Turns out once I get the fuck away from them, I can actually manage fairly well on my own. Oh and theres the whole got two bachelors degrees simultaneously and am very good at a multitude of tech/programming/db admin/data analysis type stuff, and I was making more money than my entire immediate family combined until their most recent attempt to declare me insane for disagreeing with their (objectively wrong) econonomic and political opinions (my degreees are in econ and poli sci, none of them have any degrees).

... Anyway, there's much more to an autism diagnosis than just the heightened hearing/seeing/touch sensations, but that is a fairly significant component of it.

There are some decent, long form, like 200+ question tests you can take online from actual medically endorsed autism awareness organizations... if you think you may actually have it, take one of those and then take your results to a psychologist.

[–] Lorindol@sopuli.xyz 6 points 3 days ago

I had this before my hearing was damaged in my mid-thirties. I could hear if any electrical device with large filter capasitors was turned on, even from another room. I discovered by accident that the high pitch noise was emitted by the capasitors when I was fixing old audio gear, I guess they vibrate while doing their job or something like that.

I talked about this with my friend who was specializing to be an ear/hearing doctor, his theory was that my upper hearing range was a bit higher than average. He also talked about how brains filter sensory data and it could just be that my filters weren't blocking these frequencies.

It was also impossible for me to sleep in a room if there were any mosquitoes. The whining of their wings even in the far side of a room was maddening, so I had to kill them all every night before hitting the bed. The one good thing that came out of the damage to my hearing was that the mosquitoes bother me no more, unless they fly right in front of my ears.

[–] quediuspayu@lemmy.dbzer0.com 18 points 4 days ago* (last edited 4 days ago) (1 children)

I used to hear it too, now I'm old and I can't hear anything above 16KHz, maybe less now.

[–] Quibblekrust@thelemmy.club 2 points 3 days ago

Same, but more like 13k Hz last time I tested myself.

[–] cram42@mander.xyz 12 points 4 days ago

Welcome to the world's most useless club.

Used to be able to walk down the street and know who's home watching TV by the whine (sort of like an extremely high pitched white noise).

Now CRTs are gone I've since realised I also have tinnitus and am constantly hearing that same sound in my left ear.

(╯°□°)╯︵ ┻━┻

[–] atempuser23@lemmy.world 5 points 3 days ago

Bet you can hear ‘ultrasonic’ pet repellant as well.

[–] Fluke@lemm.ee 10 points 4 days ago (1 children)

Diagnosed autistic?

It's very common for us 'spergs to have a very high frequency cut off on our hearing, all the way to old age.

I'm 43 and can still hear the bats chirping when they're hunting insects in the twilight round the gardens. People think I'm making it up, until I point the bats out, tracking them by sound until they flutter high enough to see their silhouette against the sky.

CRT TVs and monitors used to annoy the hell out of me. The high pitched whine of the flyback transformer that runs the motion of the electron beam makes a very distinctive hiss. Like someone else on here, I could tell what refresh rate your monitor was running in by the noise it made.

That, plus an abnormally high flicker fusion frequency meant I had migraines every other day when I was working. :-/

[–] brap@lemmy.world 9 points 4 days ago (1 children)

Interesting, never knew that. I’m in my 40s and can still hear the annoying high-pitched whine from the speaker outside a shop near me that’s designed to keep kids from hanging around.

[–] Fluke@lemm.ee 12 points 4 days ago (1 children)

Ah, the "Mosquito" device.

I have strong feelings on those things. Strong enough to drill holes in one while up a ladder wearing a visi-vest.

Side note: It's amazing how invisible you become while wearing a high-vis vest and a hard hat.

[–] KittenBiscuits@lemm.ee 3 points 4 days ago

An IN-visi-vest, if you will

Not as cool as Predator camouflage but just as effective.

[–] Zwuzelmaus@feddit.org 10 points 4 days ago (1 children)

think I was crazy or had tinnitus

When you have tinnitus, then you will know it. And then you probably can't hear that CRT screen anymore.

About "crazy" I don't know ;)

[–] KittenBiscuits@lemm.ee 2 points 4 days ago

Nope, I usually hear both! 🙃

[–] bjoern_tantau@swg-empire.de 9 points 4 days ago

Should be an age thing. I remember at school that some teachers would leave the TV on when they were done showing something and the CRT noise would make us students crazy and we had to remind the teacher to turn it off.

So you will probably lose it at some point.

[–] Irelephant@lemm.ee 2 points 3 days ago

I can hear it too. Its a fuzzy buzzing noise.

[–] SreudianFlip@sh.itjust.works 5 points 4 days ago

Approximately 15.5KHz. Not out of range for healthy human hearing. Most of us are damaged by noise pollution and blood pressure issues by the time we’re adults and high frequency sensitivities drop off first.

If a CRT is on in a large space with volume off, I can still hear it a bit, but mild tinnitus masks most of it.

[–] MicrowavedTea@infosec.pub 4 points 4 days ago (1 children)

It might happen with non-crt screens too. I remember a flat screen (LCD?) that made a different noise depending on the color it displayed. White and light colors made a lot more noise and if you had good ears you could tell the difference without looking. Not sure how they work though to explain this.

[–] Fluke@lemm.ee 7 points 4 days ago* (last edited 4 days ago)

"Coil whine".

The inductors used in the power regulation circuitry physically vibrate due to the electromotive force the part relies on to function. Changes in the load on the power supply changes the characteristics of the vibration, allowing audible detection of the variation.

The physical vibration slightly alters the electrical characteristics too, which is why inductors are glued down or "potted" in some equipment to try and negate this effect.

Edit: The inductors on your graphics card can whine too. This generates noise on the ground line of the whole PC which is then amplified by cheap sound devices, which is why you can literally hear the mouse moving on the screen on some PCs.

[–] synapse1278@lemmy.world 4 points 4 days ago

Some power-supplies also do this high pitch noise too and it bothers me a lot. Most people can't hear it.

[–] rebelflesh@lemm.ee 2 points 4 days ago
[–] baduhai@sopuli.xyz 2 points 4 days ago

I can hear CRTs too, but I haven't seen one in so long I don't know if I still can. It was so high pitched I've probably lost the ability to hear the frequency.

[–] tetris11@lemmy.ml 2 points 4 days ago (1 children)

I could detect it as a kid, but definitely not past 25

[–] Fluke@lemm.ee 5 points 4 days ago

I can still hear the bats pinging for insects round the back gardens. I was 43 last week :-p

[–] x4740N@lemm.ee 1 points 4 days ago

You probably should get yourself checked for Autism Spectrum Disorder and so does anyone else who experiences anything similar

Some people with ASD have a sensitivity to things neurotypical people don't notice

Autism is a Spectrum Disorder so not all autistic people have the same symptoms and you can't self diagnose yourself, you need to see someone specialised for that

[–] DogWater@lemmy.world 1 points 4 days ago

Yeah I think everyone used to be able to hear that. Elementary school videos all the kids could hear of the teacher left the TV on in our class rooms.