NEN-EN-ISO 3741
Acoustics - Determination of sound power levels of noise sources using sound pressure - Precision methods for reverberation rooms
| Organization: | NEN |
| Publication Date: | 1 October 1996 |
| Status: | inactive |
| ICS Code (Acoustics in building. Sound insulation): | 91.120.20 |
| ICS Code (Acoustic measurements and noise abatement in general): | 17.140.01 |
| ICS Code (Safety of machinery): | 13.110 |
scope:
Specifies a direct method and a comparison method for determining the sound power level produced by a source. 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 level from which the sound power level of the source in octave or one-third-bands is calculated with a grade 1 accuracy. The quantities to be measured are time-averaged sound pressure levels in frequency bands. The quantities to be determined are sound power levels, A-weighted and in frequency bands. Other quantities which are optional are sound power levels with other frequency weightings calculated from the measurements in frequency bands. This standard does not provide the means to determine directivity and temporal variation of sound from a source.
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