Types and causes of hearing loss

Understanding the types and causes of hearing loss will help you feel more comfortable and confident that you are making the right choice for you or your loved one.

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What you'll find on this page

  • Learn about the types and causes of hearing loss
  • Understand your degree of hearing loss.
  • Discover potential solutions for each type of hearing loss.

Every hearing loss story is different, and the causes vary widely from person to person. For example, your hearing loss may affect one ear or two, and it may stem from a problem in the inner, middle or outer ear, or from a combination of places.

However, there is one thing that remains constant for anyone impacted by hearing loss—knowing what it is and what's causing it is key to finding the right solution.

 

Types of hearing loss

Sensorineural hearing loss occurs when the inner ear (cochlea) or hearing nerve is damaged or does not work properly. With sensorineural hearing loss, sounds are not only softer, but also difficult to understand — especially when it is noisy.

Common causes include:

  • congenital hearing loss

  • ageing

  • exposure to loud noise

  • head injury

  • genetics

  • illness

  • adverse reaction to medications.

Treatment options include:

 

High-frequency hearing loss is a type of sensorineural hearing loss where it may be possible to hear some sounds with a lower pitch, but not high-frequency sounds like birds chirping.

Common causes include:

  • congenital hearing loss

  • ageing

  • exposure to loud noise

  • head injury

  • genetics

  • illness

  • adverse reaction to medications.

Treatment options include:

 

Sensorineural hearing loss can occur in one or both ears. If the loss is in one ear, it is often referred to as unilateral hearing loss or single-sided deafness. This is when there is little or no hearing in one ear, but normal hearing in the other ear.

Common causes include:

  • viral infections

  • illness

  • adverse reaction to medications

  • head or ear injuries

  • many other unknown reasons.

Treatment options include:

 

Conductive hearing loss occurs when damage to the outer ear or middle ear blocks sound vibrations from reaching your inner ear, or cochlea. With this type of hearing loss, ears may feel plugged and speech may sound muffled, especially if there is a lot of background noise.

Common causes include:

  • malformations at birth such as Microtia and Atresia
  • syndromes such as Down, Goldenhar and Treacher Collins

  • chronic mastoiditis or middle ear infections

  • skin growth or cyst (cholesteatoma)

  • draining ears

  • chronic ear infections

  • previous ear surgeries

  • benign tumors.

Treatment options include:

 

Mixed hearing loss refers to a combination of conductive and sensorineural hearing loss. This means there may be damage in both the outer or middle ear and the inner ear.

Common causes include:

  • Any of the causes of conductive hearing loss plus any of the causes of sensorineural hearing loss

Treatment options include:

 

Degrees of hearing loss

Understanding your degree of hearing loss is integral to identifying the right treatment. For example, hearing aids may be a good solution for someone with mild to moderate hearing loss, while hearing implants may be a good solution for someone with moderate to profound hearing loss.

Take a look at the illustrative audiogram below. You will see where sounds fall in loudness and frequency scales to help you understand what you may or may not be able to hear.

Make an appointment with a hearing health professional that is trained in advanced hearing treatment options, including hearing implants, to discuss possible solutions.

An image showing what a person can hear depending on their hearing loss

Mild hearing loss

You may hear speech, but soft sounds are hard to hear, such as whispers or the consonants on the end of words like 'shoes' or 'fish'.

Moderate hearing loss

You may hear another person speaking at a normal level, but have difficulty understanding what he or she is saying. You might hear the vowels within a sentence, but not hear the consonants. This makes comprehending a sentence almost impossible.

Severe hearing loss

You may hear little to no speech of a person talking at a normal level and only some loud sounds. Very loud sounds, such as a car horn, wouldn't startle you the same way as it would to a person with normal hearing.

Profound hearing loss

You don't hear any speech — only very loud sounds — and you feel the vibrations of only the loudest of sounds.

Understanding the audiogram

Your audiologist will map your type and degree of hearing loss on a chart called an audiogram. Learn what it is and how to read it.


Learn more

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- Cindy M. - Baha recipient

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Disclaimer

Please seek advice from your medical practitioner or health professional about treatments for hearing loss. They will be able to advise on a suitable solution for the hearing loss condition. All products should be used only as directed by your medical practitioner or health professional. Not all products are available in all countries. Please contact your local Cochlear representative.

Views expressed by Cochlear recipients and hearing health providers are those of the individual. Consult your hearing health provider to determine if you are a candidate for cochlear technology and to understand the associated risks and benefits. Individual results may vary.

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