Hearing loss is a decreased ability to hear. There are two types: of hearing loss, conductive and sensorineural. There may also be a mixture of the two.
- Conductive—when sound cannot get through the outer and middle ear
- Sensorineural—damage in the inner ear that leads to hearing loss
A person may also have a mix of both types.
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Conductive hearing loss is caused by problems that make it hard for sound to travel from the outer to the middle or inner ear, such as:
- Impacted earwax
- Fluid in the middle ear
- Repeated or poorly treated ear infections
- Perforated eardrum
- A foreign object in the ear
- Birth defects that affect the structure of the ear
Sensorineural hearing loss is caused by damage to the parts of the inner ear that are responsible for hearing. In some people, the cause is not known. In others, it may be due to:
Hearing loss is more common in older adults. Other things that may raise the risk of hearing loss are:
- Having other family members with hearing loss
- Genetic problems
- Work or environmental exposure to a lot of noise
- Heart diseases that affect blood flow to the ear and brain
- Taking certain medicines, such as loop diuretics, nonsteroidal anti-inflammatory drugs (NSAIDs), or antibiotics
- Neurological disorders, such as migraine headaches or multiple sclerosis
- Not getting all advised immunizations
- Autoimmune disorders, such as systemic lupus erythematosus or Cogan syndrome (rare)
Hearing loss may cause a decreased ability to hear:
- Higher-pitched sounds
- Lower-pitched sounds
- Speech when there is background noise
- All sounds
Hearing loss may also cause:
The doctor will ask about your symptoms and health history. A physical exam will be done.
An ear exam will be done. It may include:
- Weber test or Rinne test to find out which type of hearing loss you may have
- Audiometric tests to test your ability to hear
- Tympanometry to measure the pressure in the middle ear and how it responds to pressure waves
- Electrocochleography to test the function of parts of the inner ear that are responsible for hearing
Images may be taken of the ears and surrounding structures. This can be done with:
The electrical response of your brain to sound may be tested. This can be done with brain stem auditory evoked response testing.
Treating underlying health problems may improve some forms of hearing loss. Other treatment options are:
The risk of hearing loss may be lowered by:
- Managing chronic health problems
- Not smoking
- Getting all advised immunizations
- Avoiding excess noise
- Wearing ear protection when around loud noises, such as at work
When Should I Call My Doctor?
Call the doctor for any problems hearing. You should also call if there is:
- Ear pain
- Problems with speech or balance
- Sensitivity to sound
- Chandrasekhar SS, Tsai Do BS, et al. American Academy of Otolaryngology Head and Neck Surgery Foundation (AAO-HNSF). Clinical Practice Guideline: Sudden Hearing Loss (Update). Otolaryngol Head Neck Surg. 2019 Aug;161(1_suppl):S1-S45.
- Cochlear implants. National Institute on Deafness and Other Communication Disorders (NIDCD) website. Available at: https://www.nidcd.nih.gov/health/cochlear-implants.
- Sudden sensorineural hearing loss. EBSCO DynaMed website. Available at: https://www.dynamed.com/condition/sudden-sensorineural-hearing-loss.
- Daniel A. Ostrovsky, MD
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