EN ISO 3741:2010 PDF

Scope: This International Standard specifies methods for determining the sound power level or sound energy level of a noise source from sound pressure levels measured in a reverberation test room. The sound power level (or, in the case of noise bursts or transient noise emission, the sound energy level) produced by the noise source, in frequency bands of width one-third-octave, is calculated using those measurements, including corrections to allow for any differences between the meteorological conditions at the time and place of the test and those corresponding to a reference characteristic impedance. Measurement and calculation procedures are given for both a direct method and a comparison method of determining the sound power level and the sound energy level.

EN ISO 3741:2010 Referenced Document

IEC 60942:2003 Electroacoustics - Sound calibrators
IEC 61183 Electroacoustics - Random-incidence and diffuse-field calibration of sound level meters
IEC 61260:1995 Electroacoustics - Octave-band and fractional-octave-band filters
IEC 61672-1:2002 Electroacoustics - Sound level meters - Part 1: Specifications
ISO 12001:1996 Acoustics - Noise emitted by machinery and equipment - Rules for the drafting and presentation of a noise test code
ISO 3382-2 Acoustics - Measurement of room acoustic parameters - Part 2: Reverberation time in ordinary rooms; Technical Corrigendum 1
ISO 5725 Precision of test methods; Determination of repeatability and reproducibility for a standard test method by inter-laboratory tests
ISO 6926 Acoustics — Requirements for the performance and calibration of reference sound sources used for the determination of sound power levels — Amendment 1
ISO/IEC Guide 98-3 Uncertainty of measurement - Guide to the expression of uncertainty in measurement (GUM:1995). Extension to any number of output quantities

2010 EN ISO 3741:2010 Acoustics - Determination of sound power levels and sound energy levels of noise sources using sound pressure - Precision methods for reverberation test rooms (ISO 3741:2010)
2009 EN ISO 3741:2009 (FAULTY STANDARD) Acoustics - Determination of sound power levels of noise sources using sound pressure - Precision methods for reverberation rooms
1999 EN ISO 3741:1999 Acoustics - Determination of Sound Power Levels of Noise Sources Using Sound Pressure - Precision Methods for Reverberation Rooms