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EVS-EN ISO 3741:2009

Acoustics - Determination of sound power levels of noise sources using sound pressure - Precision methods for reverberation rooms

General information
Withdrawn from 06.12.2010
Base Documents
ISO 3741:1999+Cor 1:2001; EN ISO 3741:2009
Directives or regulations
None

Standard history

Status
Date
Type
Name
06.12.2010
Main
03.04.2009
Corrigendum
EVS-EN ISO 3741:1999/AC:2002
Main
EVS-EN ISO 3741:1999
This International Standard specifies a direct method and a comparison method for determining the soundpower level that would be produced by a source operating in an environment at  standard meteorological conditionscorresponding to a characteristic impedance of ρc = 400 N.s/m3 (where ρ is the density of air and c is the speed ofsound). It specifies test room requirements, source location and general rules for operating conditions,instrumentation and techniques for obtaining an estimate of mean-square sound pressure levels from which thesound power levels of the source in octave or one-third-octave bands are calculated with a grade 1 accuracy. Thequantities to be measured are time-averaged sound pressure levels in frequency bands. The quantities to bedetermined are sound power levels, A-weighted and in frequency bands. Other quantities, which are optional, aresound power levels with other frequency weightings calculated from the measurements in frequency bands. Thisstandard does not provide the means to determine directivity and temporal variation of sound from a source.
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