
Acoustics - Determination Of Sound Power Levels Of Noise Sources Using Sound Pressure - Engineering Method In An Essentially Free Field Over A Reflecting Plane
出版:Norwegian Standards (Norges Standardiseringsforbund)

专家解读视频
2009 [01/10/2009]1995 [06/02/1996]
NEN EN ISO 3744:2009 - Identical
UNI EN ISO 3744:2009 - Identical
NF EN ISO 3744:2009 - Identical
ONORM EN ISO 3744:2009 - Identical
SS EN ISO 3744 Ed. 2 (2009) - Identical
UNE EN ISO 3744:2010 - Identical
SN EN ISO 3744:2010 - Identical
SN EN ISO 3744:1996 - Identical
UNE EN ISO 3744:1996 - Identical
NBN EN ISO 3744:1996 - Identical
NBN EN ISO 3744:2010 - Identical
NEN EN ISO 3744:2010 - Identical
SS EN ISO 3744 Ed. 3 (2010) - Identical