专家解读视频
Defines a laboratory substitution method for determination of insertion loss without flow of ducted, mostly absorbent, circular and rectangular silencers in addition to other duct elements to be used in ventilation and air-conditioning systems.
NEN EN ISO 11691:2009 - Identical
UNI EN ISO 11691:2009 - Identical
SS EN ISO 11691 Ed. 1 (1995) - Identical
ISO 11691:1995 - Identical
UNE EN ISO 11691:1996 - Identical
NS EN ISO 11691 Ed. 1 (1995) - Identical
UNI EN ISO 11691:1997 - Identical
NF EN ISO 11691:1996 - Identical
I.S. EN ISO 11691:1996 - Identical
DIN EN ISO 11691 (1996-02) - Identical
ONORM EN ISO 11691:1996 - Identical
BS EN ISO 11691:1997 - Identical
NEN EN ISO 11691:1995 - Identical
SN EN ISO 11691:1996 - Identical
