NBN EN ISO 3744 : DEC 2010现行
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：Belgian Standards
专家解读视频
基本信息
标准编号： NBN EN ISO 3744 : DEC 2010
标准类别：Standard
出版单位：Belgian Standards
标准页数：0
标准简介
Describes methods for determining the sound power level or sound energy level of a noise source from sound pressure levels measured on a surface enveloping the noise source (machinery or equipment) in an environment that approximates to an acoustic free field near one or more reflecting planes.
