Ключевые слова: acoustician, acoustics, advertising, advice, aid, bad, board, chalk, communication, communication problems, deaf, ear, earphone, female, hard of hearing, hearing, hearing aid, hearing aids, hearing loss, hearing test, hearingimpaired, investigation, listening, loss, offer, offering, otoplasty, pensioner, people, problems, quality of life, selling, shop, sound, technology, test, understand, understanding, woman,