Ключевые слова: acoustic, acoustical, adult, aid, amplifier, assistive, audiology, background, closeup, copy, deaf, deafness, defect, device, diagnosis, difficulty, disability, disabled, disorder, ear, elderly, health, hearing, home, impaired, impairment, indoors, loss, male, man, mature, medical, medicine, person, problem, senior, sound, space, technology, text,