
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:Italian Standards

专家解读视频
Describes a method for measuring the sound pressure levels on a measurement surface enveloping a noise source, under essentially free-field conditions near one or more reflection planes, in order to calculate the sound power level produced by the noise source. Also provides requirements for the test environment and instrumentation, as well as techniques for obtaining the surface sound pressure level from which the sound power level of the source is calculated, leading to results which have a grade 2 accuracy.
SS EN ISO 3744 Ed. 3 (2010) - Identical
NEN EN ISO 3744:2010 - Identical
NBN EN ISO 3744:2010 - Identical
NBN EN ISO 3744:1996 - Identical
NF EN ISO 3744:1995 - Identical
NS EN ISO 3744 Ed. 2 (1996) - Identical
UNE EN ISO 3744:1996 - Identical
SS EN ISO 3744 Ed. 1 (1995) - Identical
NEN EN ISO 3744:2009 - Identical
SN EN ISO 3744:1996 - Identical
ONORM EN ISO 3744:1996 - Identical
SN EN ISO 3744:2010 - Identical
UNE EN ISO 3744:2010 - Identical
SS EN ISO 3744 Ed. 2 (2009) - Identical
ONORM EN ISO 3744:2009 - Identical
NS EN ISO 3744:2009 - Identical
NF EN ISO 3744:2009 - Identical