New ears for old: auditory implants and frequency transposing hearing aids.
D000328:Adult; D001301:Audiometry, Pure-Tone; D002648:Child; D003054:Cochlear Implants; D003638:Deafness / Q000534:rehabilitation*; D006310:Hearing Aids; D006312:Hearing Loss, Bilateral / Q000534:rehabilitation / Q000628:therapy; D006801:Humans