Standard Swedish standard · SS-EN ISO 3744:2009

Acoustics - Determination of sound power levels of noise sources using sound pressure - Engineering method in an essentially free field over a reflecting plane (ISO 3744:1994)

Status: Withdrawn

· Replaced by: SS-EN ISO 3744:2010
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Standard Swedish standard · SS-EN ISO 3744:2009

Acoustics - Determination of sound power levels of noise sources using sound pressure - Engineering method in an essentially free field over a reflecting plane (ISO 3744:1994)
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Scope
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.

Subjects

Acoustics (14.020) General (17.140.01)


Buy this standard

Standard Swedish standard · SS-EN ISO 3744:2009

Acoustics - Determination of sound power levels of noise sources using sound pressure - Engineering method in an essentially free field over a reflecting plane (ISO 3744:1994)
Subscribe on standards - Read more Dölj
Price: 1 320 SEK
standard ikon pdf

PDF

Price: 1 320 SEK
standard ikon

Paper

Show more Show less

Product information

Language: English

Written by: Svenska institutet för standarder

International title:

Article no: STD-70305

Edition: 2

Approved: 8/3/2009

No of pages: 52

Replaces: SS-ISO 3744 , SS-EN ISO 3744

Replaced by: SS-EN ISO 3744:2010