Повучен
Specifies a laboratory substitution method to determine the insertion loss of ducted circular and rectangular silencers without flow, as well as other duct elements for use in ventilating and air-conditioning systems.
ПОВУЧЕН
ISO 11691:1995
95.99
Повучен
1. 7. 2020.
ОБЈАВЉЕН
ISO 11691:2020
Akustika — Određivanje slabljenja nivoa zvučne snage za prigušivače kanala bez protoka — Laboratorijska informativna metoda
95.99 Повучен