BS EN ISO 3743-2:2009 PDF

Scope: 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.

BS EN ISO 3743-2:2009 history

2019 BS EN ISO 3743-2:2019 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
2010 BS EN ISO 3743-2:2010 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
2010 BS EN ISO 3743-2:2009 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