Hearing aids work by capturing sound, making the sound louder, and sending the sound down the ear canal, through the middle ear to the inner ear where the hearing nerves are.
Hearing aids are most helpful for people with mild to moderate hearing loss that may have been caused by:
A cochlear implant is an electronic medical device that replaces the function of the damaged inner ear. Unlike hearing aids, which make sounds louder, cochlear implants do the work of damaged parts of the inner ear (cochlea) to provide sound signals to the brain.
Cochlear implants can help people who:
A bone conduction implant is a medical device that transmits sound by direct conduction through bone to the inner ear, effectively bypassing the outer and middle ear. A bone conduction system consists of a small titanium implant, abutment and sound processor. Sound is transmitted as vibrations from the sound processor to the implant, through the bone to the inner ear.
Bone conduction implants can help people who have:
(Information from http://www.cochlear.com/)