JOHN COLE / SCIENCE PHOTO LIBRARY JOHN COLE / SCIENCE PHOTO LIBRARY
Elderly man using a hearing aid. Conceptual image with a crack representing hearing loss, showing the head of a 71-year-old man who is wearing a hearing aid in his left ear. This electronic device, designed to receive, amplify and transmit sounds, is used by those who are deaf or hard of hearing. The mould fits in the outer ear, with the electronics (in casing behind ear) amplifying the sounds received by the microphone.
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