EN ISO 3745:2012 PDF

Scope: This International Standard specifies methods for measuring the sound pressure levels on a measurementsurface enveloping a noise source (machinery or equipment) in an anechoic room or a hemi-anechoic room.The sound power level (or, in the case of impulsive or transient noise emission, the sound energy level)produced by the noise source, in frequency bands of width one-third octave or with frequency weighting Aapplied, is calculated using those measurements, including corrections to allow for any differences betweenthe meteorological conditions at the time and place of the test and those corresponding to a referencecharacteristic acoustic impedance.

EN ISO 3745:2012 Referenced Document

IEC 60942:2003 Electroacoustics - Sound calibrators
IEC 61183 Electroacoustics - Random-incidence and diffuse-field calibration of sound level meters
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 5725 Precision of test methods; Determination of repeatability and reproducibility for a standard test method by inter-laboratory tests
ISO 9613-1:1993 Acoustics; attenuation of sound during propagation outdoors; part 1: calculation of the absorption of sound by the atmosphere
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

2017 EN ISO 3745:2012/A1:2017 Acoustics - Determination of sound power levels and sound energy levels of noise sources using sound pressure - Precision methods for anechoic rooms and hemi-anechoic rooms - Amendment 1 (ISO 3745:2012/Amd 1:2017)
2012 EN ISO 3745:2012 Acoustics - Determination of sound power levels and sound energy levels of noise sources using sound pressure - Precision methods for anechoic rooms and hemi-anechoic rooms (ISO 3745:2012)
2009 EN ISO 3745:2009 Acoustics - Determination of sound power levels of noise sources using sound pressure - Precision methods for anechoic and semi-anechoic rooms
2003 EN ISO 3745:2003 Acoustics - Determination of sound power levels of noise sources using sound pressure - Precision methods for anechoic and hemi-anechoic rooms ISO 3745:2003; Including Corrigenda March 2004 and January 2006