Каталог стандартов

+7 (495) 223-46-76 +7 (812) 309-78-59
inform@normdocs.ru

BS 2497-6:1988

Заменен
Acoustics. Reference zero for the calibration of audiometric equipment, Specification for a standard reference zero using an artificial ear complying with BS 4669 — 7 стр.