Sound system equipment: headphones and earphones associated with personal music players - Maximum sound pressure level measurement methodology -- Part 3: Measurement method for sound dose management (english version)
33.160.50 Auxiliaries. Including headphones, loudspeakers, microphones, etc. / Вспомогательные устройства. Включая наушники, громкоговорители, микрофоны и т.д.
17.140.50 Electroacoustics. Including sound level meters / Электроакустика. Включая слуховые аппараты и шумомеры
