..15..What is bionic ear?

My sister’s daughter lost her hearing as a baby but when the BIONIC ear was developed she heard for the first time in 16 years

A technological implant (with a microchip) which is surgically implanted into the ear. Have you heard of a ‘cochlear implant’? This is a common name for it.
The device provides a sense of sound for someone severely hard of hearing or profoundly deaf.