I have a heart condition that I get an ECG (electro cardiogram) done for every 6 months or so. It's just an ultrasound on your heart. They always take mine from a bunch of different angles and a bunch of different types of pictures.

But I was recently in the hospital and told the technician that their machine was loud. She looked baffled. I told her I can hear the ultrasound and hers is the loudest I've encountered. Apparently I'm the only person she's ever done work on (or however to say that) that's been able to hear it.

So I guess that is my super power. Or I'm just autistic, as apparently many autists can hear very high pitched noises.

But the ultrasound is pretty cool. The frequencies and the pitch will change depending on what photo mode they're in. Like a doppler mode is all pewpewpewpewpew while the normal mode is all eeeeeeeeeeeee. Lol. It's hard to explain.

The fucking documentation for the libraries we program with, apparently. Everyone else at work either just vibecodes or goes "aw I don't know how to do that, it probably can't be done :c"

I can smell your fabric softener, no matter how long ago you used it. Artificial perfumes of any kind just murder my sinuses. It suuuucks.

I also can hear electronics, even just the lights, if that's all that's on. Maddening, because I can almost never find real silence. It's why I love camping.

I can see lights flicker when others can't.

I used to operate a drill rig for taking soil and water samples. I learned to read all the utility markings and to spot the telltale markings of previous drill work. I can walk around an urban area and tell you where all the gas stations and drycleaners used to be just based on a look at the pavement. In that sense I can "see" things others can't.

I can smell when a woman is pregnant. I've shocked several friends by congratulating them before they even took a test.

The god-awful taste of sugar substitutes.

A lot of people can taste things like saccharine I think? But I can taste any fake sugar, even when there is a mix of real and fake sugar in the same thing.

Aspartame/acesulfane is definitely the worst of them all, but sucralose, stevia… all of them taste like medicine kind of.

I can also taste the difference between cane and beetroot based granulated sugar. Beetroot sugar is sharper.

i can see very well in the dark, like pitch black night in the arctic circle in a forest i can see the ground enough that i wont trip and can avoid things like snakes

i fucking hate all the bright lights on cars now btw. the sun is genuinely distressing to me i just simply cannot go outside without sunglasses, even when its very cloudy

The ringing in my ears is my own personal sensation. There are many others with a ringing of their own, but this one is mine and it undoubtedly is as unique as my fingerprint.

I see certain shades of blue as grey, while my partner can distinguish more shades of blue than the average person, leaving me often feeling like I'm being fucked with

I wear almost exclusively grayscale clothing, except for a pair of pants that are apparently navy blue, and a shirt that's supposedly slate blue

Not me but my gf has a rare condition called SCDS. Basically, she can hyper hear her own body. Her heart sounds like a loud bass drum. She can hear her eyes when they move. She can hear her bones when they creak.

It is unsettling and can be quite dis-orienting and painful. She has surgery scheduled next year to fix it!

I used to be able to smell ants and hear electricity. My senses aren't as keen as they used to be though.

Low light vision.

I was always very sensitive to bright lights and sincerely fear I'll go blind at my last years but I can see at higher definition under low light conditions.

My vision stops processing color and I get higher definition of contrast. I've walked through dark areas with no difficulty, where others simply said they could not see a thing.

Mould, I'm always surprised at how few people can smell when food is mouldy. I've had people insist the smell is a chemical smell, until we've found the offending mouldy item (e.g. When someone's left a cup of coffee on their desk and gone on holiday) and I reap the glory of being right.

High pitched noises sometimes. I have an audio spectrum visualizer app installed to confirm these. But they can be pretty weird as they bounce around. You'll get these heat spots. Unfortunately, I feel like my ears are degrading now.

Anyway, dimmable LED lights are often a problem due to PWM. Only full brightness is quiet.

Smell, I don't even know what the hell that was. There is or was something in the back of one bus. I wouldn't say it's smell, but... something. Just a spicy punch that doesn't quite let me breathe in. I noted down the license plate if I'll experience it again to confirm it's the same vehicle, but this wasn't the first time, though unfortunately I didn't copy it that first time. Same line though, so possibly same vehicle as well.
But I am not sure if I was the only one, no one was visibly bothered, but who knows.

Coil whine

When food is going to go off, or when an object has developed mildew/black mold, I can tell way before anyone else by smell.

I can feel whether a battery is full or empty based on its weight. I know it doesn't make sense but I've done a blind test and it works. Empty battery is lighter.

Not exactly sense, but my brain's processing. I can easily pick out the melody of only 1 instrument in music. It's like Fourier transform but on instrument level.

There are syringes that come prefilled with saline used to flush IVs. Some people can taste it when it's injected, others can't. I'm one of those who can.

I can quickly learn to recognize specific people's footsteps, so I can hear who's approaching. Sometimes it doesn't even depend on what footwear the person is wearing.

Apparently I can hear high pitched sounds too. I've heard such sounds several times where people around me weren't able to hear it, and recently I could hear an ultrasound device too, which kinda make sense since they start at around 20 kHz.

Also, this isn't about sensing, but I can slow my heart rate temporarily simply by holding my breath.

Despite having tinnitus, I can still hear very subtle sounds and identify them.

• For example, a long, deep hum means a garage door is opening/closing.
• I can also hear (and feel) footsteps and movement from people around a building, even very subtle movement.
• I can also pick up on all the little creaks a building makes.

However, despite being able to hear subtle sounds, I cannot hear "no" sound or silence due to the ringing. :/

I can smell iron in the soil from a distance (depending on how much there is), and if there's a lot of iron I feel very sick, almost like I'm going to vomit, and I want to get away from it. There was one place like that where the closer I got the more sick I felt and the more iron I smelled, I could taste it like there was blood in my mouth, some months later did they start digging there and found a lot of iron.

I do not really like lager (love other types) for the same reason, the taste has a lot of iron in it especially some brands but I seem to be the only one who can taste it. I kind of rank lager as less or more irony taste lol.

Sometimes at some bars does one or multiple beers on tap taste weird and sweet regardless of type or brand. No one else of my friends seem to be able to tell. I where at a bar once where only one beer tap tasted as it should... The rest had the same sweet weird taste.

I also do not like coca-cola or Pepsi so my taste buds may just be weird.

Apparently I am the only one who can smell this odor that is on dish sponges. It it harsh as smelling salts and is like burning chemicals of some kind. It is not on fresh sponges and doesn't always develop on used sponges. I thought it might be a chemical reaction between the soap and synthetic sponge materials. I tried searching for it online but haven't found an answer yet.

I can hear the muscles in my eyes when I look from side to side or up and down.

I can tell where a laser is pointed on me without looking. Like if you blindfold me and got a laser pen and shined it on my arm, I can point to where it feels like it is with pretty good accuracy. It’s easier to detect motion than precise placement, and sensation wise it’s not touch or heat like you’d expect it’s more like raw proprioception.

Also it felt the same regardless of the color of laser we used which seems odd since you’d think higher frequency light would be easier to detect.

Tbf I haven’t done the experiment since I did it with my siblings when I was pretty young. Not sure if I can still do it, but my siblings and cousins couldn’t do it even back then.

Changes in air pressure(I think). Its like everything goes quiet theres ringing it feels very weird. I always ask to see if anyone else notices.

You how you get up on a winter morning after the rain and everything sounds different and the air is crisp. Yeah sometimes I can feel that a sudden shift and its very jarring like ive been stunned for a few seconds.

apparently no one i know can sense the chemical/marker(?) taste in artificial cherry flavouring like dr. pepper or cherry coke/pepsi

i seriously don't know how anyone can get past that taste, so i figure people either enjoy it, or don't notice it

I think maybe I'm sensitive to some bad smells other people don't get. One time someone was demonstrating to a group (including me) making chocolate and it smelled like vomit to me and I had to leave. The others weren't bothered.

This might be a personal preference thing rather than a sensing-something-undetectable thing but I've always hated the flavour of dairy—can't stomach dairy milk, dairy cheese, dairy butter, etc. The vegan versions of these things are fine to me though because they don't have that distinct "dairy" flavour whilst still having the other qualities of the product.

If it's dark and I see a light at just tge right angle, I see an image of the blood vessels inside my eyes.

The frame rate on high refresh monitors

I've got friends that say they can't tell the difference, who've only ever used 60hz

Back in my youth when I ruined my teeth by drinking 5-6 liters of Coca Cola a day, I could smell if a bottle was three or less months from expiration date, or if it was fresher.

I can hear baselines (from blocks away!) that my family can't hear at all. Or, hear isn't the right word, but I feel it as an ache in my ears and head.

I notice echoes even in smaller spaces. Like rooms. Carpets don't stop the echoes. These echoes are unique in homes. They always sound "metallic". Like sound bouncing off metal. Hard to explain.

Any room that is mostly empty (regardless of curtains, rugs, carpet) will have that echo sound. But furnishings definitely mute it.

It's not pleasant.

It's distorted in a strange way like when people talk through a fan. That's the closest way I can describe it.

Idk what causes it specifically. I suspect windows.
The glass is likely the culprit.

Also the echoes have a very short latency. But I'd be surprised if others havent noticed them.

I can see an actor and know immediately whether they guest starred or were an extra with a line in the TV show Wings.

My nose is more sensitive than average to certain types of foul smells mostly in the poop and rotting organic material categories but also things like mouse / rodent urine, skunks, and cigarette smoke. Oh joy.

Mostly it makes me feel like I'm going crazy because I smell these things when nobody else seems to notice leading me to wonder if I'm just hallucinating the smell. But sometimes I put it to good use by being the early warning system of skunks in the area and sometimes I'm the first to notice when the milk is starting to go bad.

I can taste water, irl no one I met really can feel the different tastes of plain water but i can

Constant droning Like tinnitus except very low-pitched. Probably caused by intracranial hypertension.

Older TVs I could "sense" when they were turned on or off like a room over.

I assume it was a sound but I couldn't really explain it back then lol, it really was more of a "feeling"

i can hear power supplies. kinda annoying.

I don't know what it is, but I can smell a somewhat metallic type smell on some specific people's breath. It always smells very similar between different people. They generally aren't very healthy, but no one seems to know what I'm talking about.

The chemical most places use for drycleaning is perchloroethylene, or perc, which can contaminate groundwater if not stored or disposed of properly.

I think I can see more colours in the stars than most people. I can also tell the northern lights are coming up earlier, so probably just low-light cone sensitivity.

A wasp died in a vent a bit ago and it smelled awful to me, but nobody else could perceive it at all.

I'm a super-taster and thanks to lots of childhood abuse I'm hypervigilant. So pretty much everything. If a person anywhere in the area has been smoking or in a smoky room any time in the last day or two, I'll know it. I know what you last ate - and drank, if it wasn't water. I can hear a woman sobbing quietly in a locked room down the hall when nobody else can.

I see beauty in the clouds in the sky at night. I smell faint smoke on the wind. Scents that remind me of long ago, when I was a child - like the smell of shrinky-dinks coming off a hot metal mold, or pastries coming out of an Easy-bake oven. Autumn leaves swirling in an icy breeze. Or the smell of something like earwax, or tar.

I often wonder how normal people live without sensing so much of the world!

I don't have a sense of smell but I can still smell if it's cold or hot outside.

Ah I can hear security cameras sometimes.

I can smell when someone is about to be sick. They start smelling like cucumbers to me. I hate cucumbers.

I'm very near-sighted. Also means I have a built-in microscope.

Mold, or at least some types of mold. Used to smell it on food but other people couldn’t, so just assumed it was something else. But did the experiment by putting things in their own containers and leaving them out for a while, while probably not the best sample size, the muffins that smelled like mold eventually visibly showed it.

I have Synesthesia. When I hear certain sounds, I see these little bubbles of color. It’s sort of similar to the eye-floater things you get sometimes, that’s the best way I can describe it. I’ll also get a taste in my mouth looking at specific colors.

I’m not sure if that counts, but it’s the first thing I thought of.

The flickering of my parents old Plasma they can't.

I can sense when it's time to wake up, while asleep.

It's likely just confirmation bias, but I almost always wake up minutes before my alarm if I have a stressful or unusual appointment, like an early flight or interview.

I assume most people has this with their routine wake-up time, that the body learns when to wake up right on time... but this is like: if I usually wake up at 8:30 but now have to wake up 5:45 or 6:15 or whatever, I'll wake up on my own right before the alarm goes off. I just need to think about it somewhat thoroughly (wake-up time and approx. how many hour of sleep until then) before falling asleep.

I can see dead people.

Before I lost my sense of smell I was absurdly sensitive to ranch. If my ex opened a ranch dip in the apartment I would be dry-heaving very quickly. When I was a kid I would sometimes move seats eating lunch at school because other kids had ranch doritos. Not having to deal with that anymore was a rare positive to come out of my awful experience with covid.

I can enjoy coldcuts and cheeses, but they'll make me sick if they're not extremely fresh. In some cases they already smell and taste like they've gone rancid fresh off the slicer.

Pancreatitic sepsis fucked my tastebuds, my hospital stay was extended a full week because I couldn't keep down foods other than sweets. They actually restarted me on the feeding tube because of that. When I went off the NPO and got to eat again for the first time I asked for a spicy sandwich from Chick-Fil-A, I'm pretty sure it was just an ordinary spicy sandwich but in that moment it tasted like the spiciest thing I had ever eaten in my entire life. I don't like the taste of water anymore, which is miserable.

I can smell carbon monoxide.

The tragedy of my life

Idk if it's rare, but my wife thinks it's weird that I can smell on the breeze if we are near a winery. It's kind of an astringent smell

Unlawful orders from a cop. Its a curse.