Hyperacusis (Sound Sensitivity)

What is hyperacusis?

In hyperacusis, the volume control in the brain's hearing system is set too high. The ear itself usually works normally, but the central auditory pathways amplify incoming signals. Sounds at ordinary levels, often 50 to 70 decibels (a conversation or a running tap), are perceived as too loud.

Specialists describe several forms, which often overlap:

• Loudness hyperacusis: sounds are perceived as too loud.
• Pain hyperacusis (noxacusis): sound causes ear pain, burning or a stabbing feeling, sometimes lasting hours or days after exposure.
• Annoyance and fear hyperacusis: strong distress or fear of sounds, leading to avoidance.

Hyperacusis vs misophonia vs phonophobia

Symptoms

• Normal sounds feel too loud, sharp or harsh: cutlery, children's voices, sirens, doors, running water
• Ear pain, pressure or a feeling of fullness after noise
• Worsening tinnitus after noise exposure
• Headache, fatigue and irritability in noisy places
• Anxiety, avoiding restaurants, shops or work, and social isolation
• In one ear or both

Causes

Ear and hearing causes

• Noise exposure: a single very loud sound (acoustic trauma) or years of noisy work, music or firearms
• Hearing loss, especially sudden or age-related
• Ménière's disease and superior canal dehiscence (a thin spot in the inner ear bone)
• Ear surgery

Nerve and brain causes

• Bell's palsy or Ramsay Hunt syndrome, which paralyze the stapedius muscle that normally damps loud sounds
• Head injury and concussion
• Migraine, where sound sensitivity occurs during attacks and sometimes between them
• Lyme disease, multiple sclerosis and some medicines or benzodiazepine withdrawal

Developmental and mental health links

• Autism spectrum disorder and Williams syndrome, where sound sensitivity is common in children
• Post-traumatic stress disorder, anxiety and depression, which can heighten the fear and alarm response to sound
• Chronic fatigue syndrome and fibromyalgia

Often no single cause is found.

How hyperacusis is diagnosed

An ENT doctor (otolaryngologist) examines the ears and asks when it started, which sounds are hardest, whether there is pain and how much life is affected. An audiologist then performs:

• Pure-tone audiometry: a standard hearing test
• Loudness discomfort levels (LDLs): sounds are increased slowly until they become uncomfortable. Lower-than-normal LDLs support the diagnosis. Tests are done carefully to avoid worsening symptoms.
• Questionnaires such as the Hyperacusis Questionnaire, to track severity and progress
• Scans or further tests only if there is one-sided hearing loss, facial weakness or other nerve signs

Treatment

There is no medicine that cures hyperacusis, but most people improve with a structured program.

Sound therapy

Wearable sound generators or a low-level background sound at home (such as pink noise) expose the hearing system to gentle, steady sound. Over months, the brain gradually turns its sensitivity back down. Sound levels are increased slowly and kept comfortable. Tinnitus retraining therapy combines sound therapy with structured counseling.

Cognitive behavioral therapy (CBT)

CBT reduces fear and avoidance of sound, which otherwise feed the problem. It has good evidence for the distress caused by both tinnitus and hyperacusis.

Smart use of ear protection

• Wear earplugs or earmuffs for genuinely loud activities: concerts, power tools, motor sports.
• Avoid wearing earplugs or noise-canceling headphones in quiet or ordinary settings. Overprotection deprives the brain of sound and makes it more sensitive.
• Consider musician's earplugs, which lower volume evenly without muffling.

Treating related conditions

Treat migraine, anxiety, depression or sleep problems. Hearing aids, carefully programmed, can help people with hearing loss and recruitment.

Outlook

Hyperacusis after noise exposure or a viral illness often improves over weeks to months. Long-standing cases improve more slowly, but most people who follow sound therapy and counseling report meaningful improvement within 6 to 18 months. Pain hyperacusis can be more stubborn and needs specialist care.

Prevention

Protect your hearing: keep personal music below about 60% volume for no more than 60 minutes at a time, wear ear protection around noise over 85 decibels, and take quiet breaks in loud venues.

Frequently asked questions

What causes hyperacusis?

The most common cause is noise exposure, either a single very loud sound or years of noisy work or music. Other causes include tinnitus, hearing loss, head injury, migraine, Bell's palsy, Lyme disease and some medicines. It is also common in autism. In many people, no specific cause is found.

Is hyperacusis curable?

There is no instant cure, but hyperacusis often improves a lot. Sound therapy, which gently retrains the brain's hearing system, and cognitive behavioral therapy help most people tolerate everyday sounds again over 6 to 18 months. Cases after a single noise injury sometimes resolve on their own.

What is the difference between hyperacusis and misophonia?

Hyperacusis is about loudness: ordinary sounds feel too loud or painful. Misophonia is about meaning: particular sounds, like chewing or sniffing, trigger anger, disgust or panic even when they are quiet. Some people have both. Treatment differs, with misophonia relying more on psychological approaches.

Should I wear earplugs if I have hyperacusis?

Only in genuinely loud places. Wearing earplugs all the time, even in quiet surroundings, trains the brain to become more sensitive and usually worsens hyperacusis. Audiologists recommend gentle background sound at home and protection reserved for concerts, power tools and similar noise.

Can anxiety cause sound sensitivity?

Anxiety does not usually start hyperacusis by itself, but it heightens the brain's alarm response to sounds and makes sensitivity worse. Hyperacusis also causes anxiety by limiting daily life. Treating anxiety with cognitive behavioral therapy often reduces the distress caused by sound sensitivity.