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Sometimes a person startles at an ordinary sound that other people barely notice. It can be hard to follow a conversation or listen to a lecture when rain is falling outside, people are whispering behind you, or construction noise comes through closed windows.
The sounds you need to hear merge with everything else into a hum. Words blur into the background, attention wanders, and tension builds. Making sense of what you hear takes so much effort. It is as though there were no button to turn the background down.
Sometimes it is the other way around. There is an inner need for more volume, more clarity, more rhythm. Without it, sound doesn’t seem to come together or stay in focus. Very loud rock music can feel comfortable. The rumble of the subway, the roar of a plane taking off, or the beat of drums can feel wonderful—as though you could listen forever.
This is about how the brain and nervous system process sound, rather than the hearing organs themselves.
There are two ways this can differ from the usual range. We speak of sensory processing difficulties when the differences are persistent, cause discomfort, and affect quality of life. Otherwise, they may simply be variations within the usual range.
Auditory hypersensitivity
There seem to be too many sounds, too much background noise. You become overloaded quickly and need quiet to recover.
What might you notice?
- Sharp or sudden sounds feel irritating.
- Noisy places—a café, public transport, the street—feel hard to bear, and you want to leave quickly.
- Particular sounds that other people barely notice cause stress: tires on a road, light rain, or a cat meowing.
- It is difficult to pick out speech and stay with a conversation when there is background noise.
- You want to cover your ears, leave, or turn the volume down.
- After a long time in noise, you feel tired, tense, or stressed.
- Your body reacts: startling, tensing, breathing faster, sometimes even developing painful muscle spasms.
Here, the nervous system is looking for less input: quiet, predictable sounds that feel safe, control over the volume, and breaks.
Auditory hyposensitivity
Sound seems to come through more faintly, even without a physical hearing loss. It doesn’t feel strong enough to hold your attention.
What might you notice?
- You don’t always respond straight away when someone speaks to you.
- Your attention seems to drift when sounds aren’t strong enough.
- A raised or very loud voice can actually feel calming.
- You often ask people to repeat themselves, especially in quiet surroundings.
- You enjoy loud music, rhythm, and rich, full sound.
- You may turn the volume up beyond what other people find comfortable.
- Background sound or rhythm makes it easier to concentrate.
- Silence can feel empty, even tense.
Here, the nervous system looks for more: volume, rhythm, richness, repetition. It can feel like sensory hunger. The brain seeks enough sensation in much the same way that a hungry body looks for food.
These are two sides of sensory processing. Hypersensitivity is like a tiny cup that overflows with a single drop. Hyposensitivity is like a bowl with a hole: it takes a lot to fill it, and you have to keep topping it up.
People sometimes read these reactions as an attitude toward others. Loved ones may take them personally and feel hurt. But this is about how the nervous system works.
A sensory diet can help with regulation, but we need to understand the person’s other sensory systems, too.
With hypersensitivity, it helps to adjust and reduce the intensity of sound. Noise-reducing headphones, including those sold by suppliers of sensory products for autistic people, can be useful.
With hyposensitivity, it can help to regularly include strong sounds you enjoy: playing a drum, spending time in lively places, or working on your computer in a busy café or restaurant. With regular input, processing sound can begin to feel more balanced.