SS-EN-ISO-3744 › Historical Revision Information
Acoustics - Determination of sound power levels of noise sources using sound pressure - Engineeringmethod in an essentially free field over a reflecting plane (ISO 3744:1994)
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This International Standard specifies a method for measuring the sound pressure levels on a measurement surface enveloping a noise source, under essentially free-field conditions near one or more reflecting planes, in order to calculate the sound power level produced by the noise source. It gives requirements for the test environment and instrumentation, as well as techniques for obtaining the surface sound pressure level from which the sound power level of the source is calculated, leading to results which have a grade 2 accuracy.It is important that specific noise test codes for variour types of equipment be established and used in accordance with this International Standard. For each type of equipment, such noise test codes will give detailed requirements on mounting, loading and operating conditions for the equipment under test as well as a selection of the measurement surface and the microphone array as specified in this International Standard. NOTE 1 The noise test code for a particular type of equipment should give detailed information on the particular surface that is selected, as the use of differently shaped measurement surfaces may yield differing estimats of the sound power level of a source.
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Designation Name
SS-EN ISO 3744:2009
Revision Level
2009 EDITION
Status
Superseded
Publication Date
Aug. 3, 2009
Language(s)
English
Page Count
52
International Equivalent
EN ISO 3744:2009(IDT); ISO 3744:1994(IDT)