NBN EN ISO 3744 : DEC 2010現行
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
專家解讀視頻
基本信息
標準編號： NBN EN ISO 3744 : DEC 2010
標準類別：Standard
出版單位：Belgian Standards
標準頁數：0
標準簡介
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.
