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Norm

ÖNORM EN ISO 3746

Issue date: 2011 03 01

Acoustics - Determination of sound power levels and sound energy levels of noise sources using sound pressure - Survey method using an enveloping measurement surface over a reflecting plane (ISO 3746:2010)

1.1 General This International Standard specifies methods for determining the sound power level or sound energy level of a noise source from sound pressure levels measu...
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Publisher:
Austrian Standards International
Format:
Digital | 56 Pages
Language:
German | English | Download GER/ENG
Optionally co-design standards:
1.1 General This International Standard specifies methods for determining the sound power level or sound energy level of a noise source from sound pressure levels measured on a surface enveloping a noise source (machinery or equipment) in a test environment for which requirements are given. The sound power level (or, in the case of noise bursts or transient noise emission, the sound energy level) produced by the noise source with frequency A-weighting applied is calculated using those measurements. NOTE Differently shaped measurement surfaces can yield differing estimates of the sound power level of a given noise source and a test code can enable detailed information to be given on the selection of the surface. 1.2 Types of noise and noise sources The methods specified in this International Standard are suitable for all types of noise (steady, non-steady, fluctuating, isolated bursts of sound energy, etc.) defined in ISO 12001. This International Standard is applicable to all types and sizes of noise source (e.g. stationary or slowly moving plant, installation, machine, component or sub-assembly), provided the conditions for the measurements can be met. NOTE The conditions for measurements given in this International Standard can be impracticable for very tall or very long sources such as chimneys, ducts, conveyors, and multi-source industrial plants. A test code for the determination of noise emission of specific sources can provide alternative methods in such cases. 1.3 Test environment The test environments that are applicable for measurements made in accordance with this International Standard can be located indoors or outdoors, with one or more sound-reflecting planes present on or near which the noise source under test is mounted. 1.4 Measurement uncertainty Information is given on the uncertainty of the sound power levels and sound energy levels determined in accordance with this I (...abbreviated)
ÖNORM EN ISO 3746
2011 03 01
Acoustics - Determination of sound power levels and sound energy levels of noise sources using sound...
Norm
ÖNORM EN ISO 3746
2009 12 01
Acoustics - Determination of sound power levels of noise sources using sound pressure - Survey metho...
Norm
ÖNORM EN ISO 3746
1996 05 01
Acoustics - Determination of sound power levels of noise sources using sound pressure - Survey metho...
Norm
ÖNORM S 5036
1986 12 01
Determination of sound power of noise sources; method in situ
Norm
ÖNORM S 5036
1977 11 01
Determination of sound power of noise sources; method in situ
Norm
Expand
Norm
ISO 3744:2010
Issue date : 2010 09 22
Acoustics — Determination of sound power levels and sound energy levels of noise sources using sound pressure — Engineering methods for an essentially free field over a reflecting plane
Technische Regel
ISO/IEC Guide 98-3:2008
Issue date : 2008 09 30
Uncertainty of measurement — Part 3: Guide to the expression of uncertainty in measurement (GUM:1995) (Corrected version 2010-11)
Norm
ISO 3744:2010
Issue date : 2010 09 22
Acoustics — Determination of sound power levels and sound energy levels of noise sources using sound pressure — Engineering methods for an essentially free field over a reflecting plane
Norm
ISO 12001:1996
Issue date : 1996 12 19
Acoustics — Noise emitted by machinery and equipment — Rules for the drafting and presentation of a noise test code
Technische Regel
ISO/IEC Guide 98-3:2008
Issue date : 2008 09 30
Uncertainty of measurement — Part 3: Guide to the expression of uncertainty in measurement (GUM:1995) (Corrected version 2010-11)
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