Imagine walking into a busy café. The clatter of cutlery, overlapping conversations, the hiss of the coffee machine, sounds many of us barely register; suddenly feel painfully sharp or confusing. For someone with Sensory Processing Disorder (SPD), this isn’t imagination. It’s reality. SPD can make everyday environments overwhelming, unpredictable, and exhausting. But there is hope. Understanding what SPD is, and how targeted auditory therapies can support it, can help countless individuals lead more functional lives.
What Is Sensory Processing Disorder?
Sensory Processing Disorder refers to difficulty in processing and responding to sensory information. This could mean being overly sensitive (hypersensitive) to textures, lights, or sounds or not sensitive enough (hyposensitive), where the body craves more stimulation to register it.
The brain is meant to filter, organise, and respond to incoming sensory data from the brightness of a room to the pitch of a voice. However, in SPD, that system is out of balance. It’s like a radio that keeps tuning in and out of frequencies, missing cues or blasting static unexpectedly.
Children with SPD might cover their ears at the sound of a vacuum or cry because a tag on their shirt feels unbearable. Adults may feel anxious in crowded spaces, struggle to concentrate in open-plan offices, or rely on headphones to get through the day.
Though not officially listed as a standalone diagnosis in many diagnostic manuals, SPD is widely recognised by occupational therapists and clinicians. It often appears in neurodivergent individuals, particularly those with autism or ADHD, but it can also affect people with no other diagnosis.
The Auditory Side of SPD: When Sound Hurts
One of the most commonly affected senses in SPD is hearing. Auditory SPD doesn’t involve hearing loss in fact, most people with this condition have normal hearing tests. The issue lies in how the brain decodes and prioritises sound.
In auditory hypersensitivity, familiar sounds like a hand dryer or a dog barking can be unbearable. A child might scream when a toilet flushes. An adult may flinch at the clinking of dishes or feel exhausted after a noisy commute. The brain is overreacting to everyday noise, interpreting it as a threat.
On the flip side, some people are under-sensitive. They barely notice soft or moderate sounds and may seek stimulation through loud music or vocalisations. A child might bang objects just to hear the noise, while an adult may prefer working in chaotic environments without understanding why.
Many people with auditory sensory processing disorder (SPD) experience both extremes in different contexts. They might be upset by background chatter at a party, but not react to their name being called softly in class.
These patterns aren’t “bad behaviour” or rudeness. They are the result of a nervous system trying sometimes desperately to make sense of its world.