It could be a hearing aid, individually tailored to the shape of the user's ear.
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Hearing-aid styles fall roughly into two categories: devices worn outside the ear and those inside the ear, which are largely invisible.
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It's not quite implantable, but Insound Medical's new Lyric hearing aid is about as close as you can get, with it designed to squeeze in deep in your ear canal and sit just a few millimeters from your ear drum.
ENGADGET: Insound's Lyric hearing aid cozies up right next to your ear drum
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