DS/EN ISO 3745:2009 ( Withdrawn )

Acoustics - Determination of sound power levels of noise sources using sound pressure - Precision methods for anechoic and semi-anechoic rooms

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This International Standard specifies methods for measuring the sound pressure levels on a measurement surface enveloping a noise source in anechoic and hemi-anechoic rooms, in order to determine the sound power level or sound energy 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 or sound energy level is calculated, leading to results which have a grade 1 accuracy.
The methods specified in this International Standard are suitable for measurements of all types of noise.
The noise source can be a device, machine, component or sub-assembly. The maximum size of the source under test depends on the radius of the hypothetical sphere (or hemisphere) used as the enveloping measurement surface.

Number of pages: 60

Published: 2009-10-13

Date of approval: 2009-09-09

Date of withdrawal: 2012-06-22

International relationships : EN ISO 3745:2009 IDT ISO 3745:2003 IDT

ICS: 17.120.10 - Flow in closed conduits 17.140.01 - Acoustic measurements and noise abatement in general

Item number: M237429



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

Danish committee