Cochlear implants have transformed the lives of hundreds of thousands of people around the world by restoring lost hearing. But externally worn sound processors outside the ear have long been a source of friction, limiting daily activities and exposing users to stigma. A new, fully implanted cochlear implant from Austrian company Med-El now offers the prospect of round-the-clock hearing without any visible sign.Since the 1980s, cochlear implants have been used to bypass damaged parts of the ear ...