Overview

Cochlear implant

A cochlear implant is a small electronic hearing device for adults or children. We put (implant) this device in your or your child’s ear through surgery.

A cochlear implant may be an option if you or your child have severe to profound sensorineural hearing loss in both ears. This is a permanent type of hearing loss caused by damage to the cochlea (the hearing organ in the inner ear).

How a cochlear implant can help

The tiny hair cells in the cochlea usually pick up sound vibrations. They send these vibrations through the hearing nerve to the brain. If the hair cells are damaged or missing, sound cannot reach the hearing nerve properly.

A cochlear implant may be suitable if:

  • hearing aids do not help you or your child much or at all
  • you or your child cannot hear or understand the full range of speech sounds

Instead of making sound louder like a hearing aid, a cochlear implant turns sound into electrical signals. It does the job of the damaged or missing hair cells and sends these electrical signals directly to the hearing nerve. They then travel to the brain, which recognises them as sound.

A cochlear implant does not restore normal hearing and the results can be different for each person. However, most adults notice an improvement in their ability to hear or understand speech and everyday sounds. If children have a cochlear implant, this can help them listen and learn to speak.

Videos on getting a cochlear implant

Before getting a cochlear implant, you or your child need an assessment with our team of specialists at St Thomas' hearing implant centre. We check if a cochlear implant is likely to help you or your child. The implant is only suitable if the hearing nerve that carries sound to the brain works properly.

We have made some videos about the assessment process for a cochlear implant at St Thomas’ hearing implant centre. This series of videos also explains the possible outcomes of having a cochlear implant.

The videos are intended for patients, family members, friends and support staff.

The team at St Thomas' hearing implant centre

This video introduces the different professionals that patients meet and explains what their roles are during an assessment for cochlear implants. 


Cochlear implant assessment process

This video outlines all of the appointments that patients will attend during their assessment for cochlear implants.

Who is suitable for a cochlear implant

This video explains the main factors taken into consideration when assessing who is suitable for a cochlear implant.

Choosing a cochlear implant device

This video explains how we decide which brand of cochlear implant is best suited to each person.

Possible outcomes of having a cochlear implant

These videos give more information about the possible outcomes and factors that can influence these, for adults and children who have cochlear implants.

For adults

For children

Resource number: 4269/VER5
Last reviewed: March 2022
Next review: March 2025

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