BS 5428-7:1979

Заменен

Methods for specifying and measuring the characteristics of sound system equipment, Automatic gain control devices

Заменен на

BS 6840-8:1988

ICS

33.160.30 Audio. Including tape recorders, records, magnetic tapes, cassettes, CDs, etc. / Аудиосистемы. Включая магнитофоны, пластинки, магнитные ленты, кассеты, компакт-диски и т.д.