標準號：BS EN ISO 3743-2-2009
中文標準名稱：聲學.聲壓法測定噪聲源的聲功率級.混響聲場中小聲源和移動聲源的工程測量方法.特殊混響試驗間用方法
英文標準名稱：Acoustics - Determination of sound power levels of noise sources using sound pressure - Engineering methods for small, movable sources in reverberant fields - Methods for special reverberation test rooms
標準類型：Z32
發布日期：2010/5/31 12:00:00
實施日期：2010/5/31 12:00:00
中國標準分類號：Z32
國際標準分類號：17.140.01
適用范圍：This part of ISO 3743 specifies a relatively simple engineering method for determing the sound power levels of small,movable noise sources.The measurements are carried out when the source is installed in a specially designed room having a specified reverberation time over the frequency range of iterest.The A-weighted sound power level of the source under test is determined from a single A-weighted sound pressure level measurement at each microphone position,rather than from a summation of octave-band levels.This direct method eliminates the need for a reference sound source,but requires the use of a special reverberation test room.The direct method is based on the premise that the sound pressure level,averaged in space and time in the test room,can be used to determine the sound power level emitted by the source.The properties of the special reverberation test room are chosen so that the room's influence on the sound power output of the equipment under test is small.The number of microphone positions and source locations required in the test room are specified.Guidelines for the design of special reverberation rooms are given in annex B.