I.S. EN ISO 11821:1997现行
Acoustics - Measurement Of The In Situ Sound Attenuation Of A Removable Screen
出版：National Standards Authority of Ireland
专家解读视频
Provides methods for evaluating the in situ sound attenuation performance of a removable screen, either indoors or outdoors.
NF EN ISO 11821:1997 - Identical
UNI EN ISO 11821:1999 - Identical
NS EN ISO 11821 Ed. 1 (1997) - Identical
SS EN ISO 11821 Ed. 1 (1997) - Identical
UNE EN ISO 11821:1998 - Identical
ISO 11821:1997 - Identical
SN EN ISO 11821:1997 - Identical
NEN EN ISO 11821:1997 - Identical
BS EN ISO 11821:1997 - Identical
DIN EN ISO 11821 (1997-08) - Identical
ONORM EN ISO 11821:1997 - Identical
NBN EN ISO 11821:1997 - Identical
