Cochlear implants do not cure hearing loss or restore hearing, but they do provide an opportunity for the severely hard of hearing or deaf to perceive the sensation of sound by bypassing the damaged inner ear. Unlike hearing aids, they require surgical implantation.

Do cochlear implants restore normal hearing?

Cochlear implants don't restore normal hearing, says Nandkumar. But depending on the individual, they can help the wearer recognize words and better understand speech, including when using a telephone.

How much do cochlear implants improve hearing?

Most individuals note a significant growth in their awareness of sounds within days after their cochlear implant is turned on, which is about four to six weeks after surgery. Speech understanding improves more gradually, with most individuals experiencing the largest improvement within the first six months.