ISO 3745:2003Withdrawn

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

Acoustique — Détermination des niveaux de puissance acoustique émis par les sources de bruit à partir de la pression acoustique — Méthodes de laboratoire pour les salles anéchoïques et semi-anéchoïques

This edition has been replaced by ISO 3745:2012.

Abstract / scope

ISO 3745:2003 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 ISO 3745:2003 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.

Life cycle

Replaces

ISO 3745:1977WithdrawnAcoustics — Determination of sound power levels of noise sources — Precision methods for anechoic and semi-anechoic roomsInternational Standard · Published 1 May 1977 · ISO/TC 43/SC 1

Replaced by

ISO/CD 3745Deleted (project abandoned)Acoustics — Determination of sound power levels of noise sources using sound pressure — Precision methods for anechoic and hemi-anechoic roomsInternational Standard · ISO/TC 43/SC 1 ISO 3745:2012PublishedAcoustics — Determination of sound power levels and sound energy levels of noise sources using sound pressure — Precision methods for anechoic rooms and hemi-anechoic roomsInternational Standard · Published 16 Mar 2012 · ISO/TC 43/SC 1