EN ISO 3744:1995

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) EN ISO 3744:1995

Publication date:   Dec 29, 2001

General information

99.60 Withdrawal effective   Jul 29, 2009

CEN

CEN/TC 211 Acoustics

European Norm

17.140.01   Acoustic measurements and noise abatement in general

Buying

Withdrawn

Language in which you want to receive the document.

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 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 is selected, as the use of differently shaped measurement surfaces may yield differing estimates of the sound power level of a source.

Related legislation

Legislation related to this standard

98/37/EC

Machinery

Harmonized/Supporting
89/392/EEC

Machinery - Safety of machinery: general essential health and safety requirements

Harmonized/Supporting

Life cycle

NOW

WITHDRAWN
EN ISO 3744:1995
99.60 Withdrawal effective
Jul 29, 2009

REVISED BY

WITHDRAWN
EN ISO 3744:2009

Relations

Adopted from ISO 3744:1994 IDENTICAL