
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:British Standards Institution

专家解读视频
2010 [31/01/2011]2009 [30/04/2010]1995 [15/12/1995]
© British Standards Institution 2013
NF EN ISO 3744:2012 - Identical
NBN EN ISO 3744:2010 - Identical
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
NS EN ISO 3744:2010 - Identical
ONORM EN ISO 3744:2011 - Identical
SN EN ISO 3744:2011 - Identical
UNE EN ISO 3744:2011 - Identical
NF EN ISO 3744:2009 - Identical
UNE EN ISO 3744:2010 - Identical