SR EN ISO 3744:1997

Acoustics. Determination of sound power levels of noise sources using sound pressure. Engineering method in an essentially free field over a reflecting plane

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 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: The noise test code for a particular type of equipment should give detailed information on the particular surface that

General information

Status : Withdrawn
Approval date : 11/20/1996
Publish date : 11/21/1996
Withdrawal date : 12/15/2009
Number of pages : 50
ICS : 17.140.01 Acoustic measurements and noise abatement in gerneral
Technical Committee : 274 - Human protection against noise and mechanical vibration

Relations with other standards:

Normative reference SR EN 27574-4:1994
Normative reference SR CEI 60804+A1+A2:1995
Normative reference SR EN 27574-1:1994
Normative reference SR ISO 2204:1997
Replaced by SR EN ISO 3744:2009