Autistic Sensitivities
This one is a wide net. Neurotypicals can't quite get this most of the time, whilst autistics are going homicidal when someone starts chewing and breathing anywhere within the a three room radius, neurotypicals are like "what?!". A whole bunch of these sensitivities exist, however I believe it's generally accepted there is a slew towards the auditory side.
It's all down to the human senses, where due to the brain of an autistic person being wired differently, certain sensations may trigger an amped up flight or fight response where the autistic person has no control over said reactions without active mitigations. There are some who react to some fabrics against their skin, others where light is just too painful, and like myself, some of us who can't stand some sounds. Most neurotypicals can't stand the sound of nails on a blackboard, or metal on metal sounds like train brakes squealing loudly. Autistic people find the same level of pain amplified many times to unbearable levels at much lower volumes, such as a person quite happily whistling half a tune - no biggie, right? Errrr no, people who whistle need to be shot on site as a standard, burnt at the stake for prolific offenders. A bit extreme I hear you mutter from your fowl whistle box? Oh, wow, the mental pain turns some autistic people into monsters who aren't recognisable - it's torture for the sensitive, I'm not kidding. The same can be true for overly loud noises... Where as a neurotypical may find the sound annoying... it's nothing in comparison.
As a note to the neurotypicals: If an autistic person asks you to kindly stop until they can remove themselves, or otherwise mitigate your foul emissions, then fucking stop before the autistic person has a meltdown.
Non-autisitc people may suffer from a form of this, look it up - misophonia. Be under no illusion, this is a mental disorder, a real disability on it's own... most of the time it's limited to specific situations!
Strictly in my own sphere of experience, chewing, breathing, whistling, loud noises, repetitive noised, those odd humming noised in a house, they all count. It's an extreme form of misophonia due to the lack of auditory filtering autistic people experience, a ticking clock three rooms away may be as loud to an autistic person as the truck rumbling down the road outside; it sounds unbelievable, but trust me, it's real.
As I aged this became worse... I literally cannot stay in a function room where a DJ is doing their own thing, I wanna pull off my ears, chop my head off or run screaming from the room, this is after the fantasy thoughts centred around stabbing said DJ or blowing up the speakers. There are some mitigations such as Loop earplugs, or more generic noise cancelling headphones. If no mitigations are around, you'll see autistic people with this sensitivity flee the room at considerable speed.
My main other auditory sensitivity is breathing and chewing, I can't stand the noise, and whilst I know my reaction isn't rational, it's something I have no control over. I either immediately mitigate the noise, or leave, there is no middle ground - should I stay I lose higher function, experience irrational rage, and it's just plain nasty.
I also have a sensitivity to light touches - I'd literally be screaming if I was touched lightly, don't mind a firm touch, crushing pressure, but not light touches - anything but that! It made trying to navigate any physical relationship challenging until my partner understood that they just couldn't touch me in that way. Don't even go there with tickling, for some autistic persons, that's actually assault - I'm not joking - don't do it.
It's also not uncommon for autistic people to have difficulty with kissing, in modern parlance, some autistic people just get the ick, extreme ick.
So yeah, when an autistic person tells anyone they're experiencing difficulty with any of their senses, believe them, be a great human and help adapt the environment for them - be it stopping chewing whilst some background noise is organised, or being aware that your autistic person NEEDS some mitigations in every day life just to function!
This whole thing also links in with delayed auditory processing. Ever been with an autistic person, and tried speaking to them... they're always like "what?", by the time you're in the middle of speaking and repeating yourself the autistic person begins to answer... yeah, that's the delay - autistic people are processing a lot more than you ever could imagine, and with that comes a bottleneck where they can't, simply can't understand your words at the speed of neurotypicals. Give the autistic person a chance to respond. Also be aware that most autistic people have an urge to answer immediately - don't force their hand, give them time to respond, by time I mean as much as they need, it may be 5 minutes, it may be an hour or a week. Be patient.