Ключевые слова: acoustic, background, beige, blue, booming, calm, care, clips, color, comfort, decibel, different, ear, earplugs, ears, equipment, foam, health, hear, hearing, hyperacusis, ignore, inserting, irritating, learning, listen, loud, many, noise, object, plugging, plugs, problem, protection, protective, pupil, quiet, reduce, safe, safety, sharpener, silence, sound, stationery, stoppers, student, study, turquoise, work, working,