標準號：SIS SS-ISO 3747-1989
中文標準名稱：聲學． 噪聲源聲功率級測定．使用參考聲源的測量方法
英文標準名稱：Acoustics — Determination ofsoundpower levels ofnoise sources — Survey method using a reference sound source
發布日期：1989/12/6 12:00:00
實施日期：1999/12/31 12:00:00
適用范圍：This International Standard specifies a survey method for measuring the sound pressure levels produced at specified measurement points by the noise source under test and by a reference sound source.The sound power level of the source under test is calculated from the measured values of the sound pressure level by using environmental corrections. These environmental corrections are calculated from the differences between the values ob-tained with a reference sound source and those given by its calibration.Different microphone arrays and different positions for the reference sound source are given for different acoustical situations, depending on the size of the source under test as well as the size, number and orientation of the reflecting planes which are situated in proximity to the source under test.The positions of the reference sound source also depend on whether it is possible to place the reference sound source on the uppermost outer surface of the source under test.