'Graeme Clark invented this type of surgically implanted multi-channel hearing aid'
a cochlear implant
I'M AUSTRALIAN: Graeme Clark invented this type of surgically implanted multi-channel hearing aid
Graeme Clark invented this type of surgically implanted multi-channel hearing aid
Graeme Clark invented this type of surgically implanted multi-channel hearing aid
I'M AUSTRALIAN
a cochlear implant
I'M AUSTRALIAN