DS/EN ISO 3746:2009 ( Withdrawn )

Acoustics - Determination of sound power levels of noise sources using sound pressure - Survey method using an enveloping measurement surface over a reflecting plane

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This International Standard specifies a method for measuring the sound pressure levels on a measurement surface enveloping the source 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 3 accuracy.
It is important that specific noise test codes for various
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 estimates of the sound power level of a source.

Number of pages: 44

Published: 2009-10-13

Date of approval: 2009-09-09

Date of withdrawal: 2011-02-11

International relationships : EN ISO 3746:2009 IDT ISO 3746:1995 IDT

ICS: 17.140.01 - Acoustic measurements and noise abatement in general

Item number: M237430



  • CEN/TC 211
  • ISO/TC 43/SC 1/WG 28

Danish committee