Cochlear implants can reconnect those with hearing loss to the world of sound. They work differently to hearing aids, which amplify sound. A cochlear implant transforms speech and other sounds into electrical energy that is used to stimulate surviving auditory nerve fibres in the inner ear.

  1. Speech processor captures then converts sound into a digital signal.
  2. Digital signal is sent through the external coil to the internal implant.
  3. Implant converts digital signal into electrical impulses which are sent along the electrode array, which is inserted inside the cochlea.
  4. Electrodes stimulate the cochlea hearing nerve, bypassing damaged cells, sending impulses to the brain where they are interpreted as sound.

How a cochlear implant works.