Final answer:
The invention meant to help those with hearing impairment is the cochlear implant.
Step-by-step explanation:
The invention meant to help those with hearing impairment is the cochlear implant. It was pioneered by Graeme Clark in the 1970s. A cochlear implant consists of three external components (microphone, speech processor, and transmitter) and two internal components (receiver/transmitter and array of electrodes).