Ключевые слова: acoustic, adult, aid, amplify, arthritis, audible, auditory, background, canal, caucasian, closeup, deaf, deafness, detail, device, drum, ear, elderly, enhance, equipment, face, female, hand, health, healthcare, hearing, holding, impairment, insert, inserting, installing, isolated, listen, lose, loss, medical, old, older, organ, people, placing, problem, receiver, reinforcement, ring, senior, sound, tinnitus, treatment, woman,