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Norm
ÖNORM EN ISO 3741
Issue date: 2003 03 01
Acoustics - Determination of sound power levels of noise sources using sound pressure - Precision methods for reverberation rooms (ISO 3741:1999 + Cor.1:2001)
1.1 This International Standard specifies a direct method and a comparison method for determining the sound
power level that would be produced by a source operating in a...
Withdrawn: 2009 12 01
Publisher:
Austrian Standards International
Format:
Digital | 45 Pages
Language:
German
| English
Currently valid:
Optionally co-design standards:
ICS
1.1 This International Standard specifies a direct method and a comparison method for determining the sound
power level that would be produced by a source operating in an environment at standard meteorological conditions
corresponding to a characteristic impedance of rc = 400 N.s/m3 (where r is the density of air and c is the speed of
sound). 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 the
sound power levels of the source in octave or one-third-octave bands are 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.
In general, the frequency range of interest includes the one-third-octave bands with midband frequencies from
100 Hz to 10 000 Hz. Guidelines for the application of the specified methods in an extended frequency range in
respect to lower frequencies are given in annex C. This International Standard is not applicable to frequency ranges
above the 10 000 Hz one-third-octave band. For higher frequencies the use of methods given in ISO 9295 is
recommended.
1.2 The method specified in this International Standard is suitable for steady noise with broad-band, narrow-band
and discrete-frequency components as described in ISO 12001. The noise may be emitted from a device, machine,
component or sub-assembly.
This International Standard is applicable to noise sources with volumes which are preferably not greater than 2 % of
the vo (...abbreviated)
ÖNORM EN ISO 3741
2011 01 01
Acoustics - Determination of sound power levels and sound energy levels of noise sources using sound...
Norm
ÖNORM EN ISO 3741
2009 12 01
Acoustics - Determination of sound power levels of noise sources using sound pressure - Precision me...
Norm
ÖNORM EN ISO 3741
2003 03 01
Acoustics - Determination of sound power levels of noise sources using sound pressure - Precision me...
Norm
↖
ÖNORM EN ISO 3741
1999 11 01
Acoustics - Determination of sound power levels of noise sources using sound pressure - Precision me...
Norm
ÖNORM EN 23741
1992 07 01
Acoustics - Determination of sound power levels of noise sources - Precision methods for broad-band ...
Norm
ÖNORM EN 23742
1992 07 01
Acoustics - Determination of sound power levels of noise sources - Precision methods for discrete-fr...
Norm
ÖNORM S 5031
1977 03 01
Determination of sound power of noise sources; method in reverberation room
Norm
Norm
Issue date :
1990 04 01
Acoustics; statistical methods for determining and verifying stated noise emission values of machinery and equipment; general considerations and definitions
Norm
Issue date :
1990 04 01
Acoustics; statistical methods for determining and verifying stated noise emission values of machinery and equipment; methods for stated values for batches of machines
Norm
Issue date :
2003 11 01
Acoustics - Measurement of sound absorption in a reverberation room (ISO 354:2003)
Norm
Issue date :
1985 01 24
Acoustics — Measurement of sound absorption in a reverberation room
Norm
Issue date :
1996 12 19
Acoustics — Declaration and verification of noise emission values of machinery and equipment
Norm
Issue date :
2016 01 12
Acoustics — Requirements for the performance and calibration of reference sound sources used for the determination of sound power levels
Norm
Issue date :
1985 12 19
Acoustics — Statistical methods for determining and verifying stated noise emission values of machinery and equipment — Part 1: General considerations and definitions
Norm
Issue date :
1985 12 19
Acoustics — Statistical methods for determining and verifying stated noise emission values of machinery and equipment — Part 4: Methods for stated values for batches of machines
Norm
Issue date :
1996 12 19
Acoustics — Noise emitted by machinery and equipment — Rules for the drafting and presentation of a noise test code
Norm
Issue date :
1999 07 29
Acoustics — Determination of sound power levels of noise sources using sound pressure — Precision methods for reverberation rooms
Norm
Issue date :
2009 12 01
Acoustics - Determination of sound power levels of noise sources using sound pressure - Precision methods for reverberation rooms (ISO 3741:1999, including Cor 1:2001)