Accoustics in theatres and multipurpose halls; measures to avoid impairing the audience's hearing by high sound-pressure levels from loudspeaker reproduction— 3 стр.
33.160.50 Auxiliaries. Including headphones, loudspeakers, microphones, etc. / Вспомогательные устройства. Включая наушники, громкоговорители, микрофоны и т.д.
97.200.10 Theatre,. Including lighting equipment / Театральное, сценическое и студийное оборудование
