Acoustic trauma
Injury - inner ear; Trauma - inner ear; Ear injuryAcoustic trauma is injury to the hearing mechanisms in the inner ear. It is due to very loud noise.
Causes
Acoustic trauma is a common cause of sensory hearing loss. Damage to the hearing mechanisms within the inner ear may be caused by:
Hearing loss
Hearing loss is being partly or totally unable to hear sound in one or both ears.
- Explosion near the ear
- Firing a gun near the ear
- Long-term exposure to loud noises (such as loud music or machinery)
- Any very loud noise near the ear
Symptoms
Symptoms include:
- Partial hearing loss that most often involves repeated long-term exposures to loud or high-pitched sounds. The hearing loss may slowly get worse.
- Noises, ringing in the ear (tinnitus).
Tinnitus
Tinnitus is the medical term for "hearing" noises in your ears. It occurs when there is no outside source of the sounds. Tinnitus is often called "r...
ImageRead Article Now Book Mark Article
Exams and Tests
The health care provider will most often suspect acoustic trauma if hearing loss occurs after noise exposure. A physical exam will determine if the eardrum is damaged. Audiometry may determine how much hearing has been lost.
Audiometry
An audiometry exam tests your ability to hear sounds. Sounds vary, based on their loudness (intensity) and the speed of sound wave vibrations (tone)...
Treatment
The hearing loss may not be treatable. The goal of treatment is to protect the ear from further damage. Eardrum repair may be needed.
Eardrum repair
Eardrum repair refers to one or more surgical procedures that are done to correct a tear or other damage to the eardrum (tympanic membrane). Ossiculo...
A hearing aid may help you communicate. You can also learn coping skills, such as lip reading.
In some cases, your provider may prescribe steroid medicine to help bring back some of the hearing.
Outlook (Prognosis)
Hearing loss may be permanent in the affected ear. Wearing ear protection when around sources of loud sounds may prevent the hearing loss from getting worse.
Possible Complications
Progressive hearing loss is the main complication of acoustic trauma.
Tinnitus (ear ringing) can also occur.
When to Contact a Medical Professional
Contact your provider if:
- You have symptoms of acoustic trauma
- Hearing loss occurs or gets worse
Prevention
Take the following steps to help prevent hearing loss:
- Wear protective ear plugs or earmuffs to prevent hearing damage from loud equipment.
- Be aware of risks to your hearing from activities such as shooting guns, using chain saws, or driving motorcycles and snowmobiles.
- DO NOT listen to loud music for long periods of time.
References
Arts HA, Adams ME. Sensorineural hearing loss in adults. In: Flint PW, Francis HW, Haughey BH, et al, eds. Cummings Otolaryngology: Head and Neck Surgery. 7th ed. Philadelphia, PA: Elsevier; 2021:chap 152.
Crock C, de Alwis N. Ear, nose and throat emergencies. In: Cameron P, Little M, Mitra B, Deasy C, eds. Textbook of Adult Emergency Medicine. 5th ed. Philadelphia, PA: Elsevier; 2020:chap 18.1.
Le Prell CG. Noise-induced hearing loss. In: Flint PW, Francis HW, Haughey BH, et al, eds. Cummings Otolaryngology: Head and Neck Surgery. 7th ed. Philadelphia, PA: Elsevier; 2021:chap 154.
-
Sound wave transmission - illustration
When sounds waves reach the ear, they are translated into nerve impulses. These impulses then travel to the brain where they are interpreted by the brain as sound. The hearing mechanisms within the inner ear, can be easily damaged by excessively loud noise causing sensory hearing loss.
Sound wave transmission
illustration
-
Sound wave transmission - illustration
When sounds waves reach the ear, they are translated into nerve impulses. These impulses then travel to the brain where they are interpreted by the brain as sound. The hearing mechanisms within the inner ear, can be easily damaged by excessively loud noise causing sensory hearing loss.
Sound wave transmission
illustration
Review Date: 5/2/2024
Reviewed By: Josef Shargorodsky, MD, MPH, Johns Hopkins University School of Medicine, Baltimore, MD. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.
All rights reserved.