
Acoustics - Determination Of Sound Power Levels And Sound Energy Levels Of Noise Sources Using Sound Pressure - Engineering Methods For An Essentially Free Field Over A Reflecting Plane
出版:Association Francaise de Normalisation

专家解读视频
2012 [01/02/2012]2009 [01/11/2009]1995 [01/11/1995]
Indice de classement: S31-025. PR NF EN ISO 3744 July 2006. (07/2006) PR NF EN ISO 3744 May 2009. (05/2009)
NBN EN ISO 3744:2010 - Identical
I.S. EN ISO 3744:2010 - Identical
NEN EN ISO 3744:2010 - Identical
SS EN ISO 3744 Ed. 3 (2010) - Identical
UNI EN ISO 3744:2010 - Identical
BS EN ISO 3744:2010 - Identical
NS EN ISO 3744:2010 - Identical
ONORM EN ISO 3744:2011 - Identical
SN EN ISO 3744:2011 - Identical
UNE EN ISO 3744:2011 - Identical