EN ISO 3745:2009

Acoustics - Determination of sound power levels of noise sources using sound pressure - Precision methods for anechoic and semi-anechoic rooms (ISO 3745:2003)

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.

Akustik - Bestimmung der Schallleistungspegel von Geräuschquellen aus Schalldruckmessungen - Verfahren der Genauigkeitsklasse 1 für reflexionsarme Räume und Halbräume (ISO 3745:2003)

Diese Internationale Norm legt Verfahren zur Messung der Schalldruckpegel auf einer die Geräuschquelle einhüllenden
Messfläche (Hüllfläche) in reflexionsarmen Räumen und Halbräumen fest, um den Schallleistungs- oder
Schallenergiepegel der Geräuschquelle zu bestimmen. Sie enthält Anforderungen an die Prüfumgebung und die
Messgeräte sowie Verfahren zur Ermittlung des Messflächen-Schalldruckpegels, aus dem der Schallleistungsbzw.
Schallenergiepegel berechnet wird. Die Ergebnisse haben die Genauigkeitsklasse 1.
Die in dieser Internationalen Norm festgelegten Verfahren sind für die Messung aller Geräuscharten geeignet.
Die Geräuschquelle kann ein Gerät, eine Maschine, ein Bauteil oder eine Baugruppe sein. Die maximale Größe der
zu untersuchenden Geräuschquelle hängt von dem Radius der gedachten Kugel (oder Halbkugel) ab, die als einhüllende
Messfläche verwendet wird.

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 (ISO 3745:2003)

L'ISO 3745:2003 spécifie des méthodes permettant de mesurer les niveaux de pression acoustique sur une surface de mesurage enveloppant une source de bruit, en salles anéchoïque et semi-anéchoïque, de façon à déterminer le niveau de puissance acoustique ou le niveau d'énergie acoustique produit par la source de bruit. Elle fournit des exigences relatives à l'environnement et à l'instrumentation d'essai, de même que des techniques d'obtention du niveau de pression acoustique surfacique à partir duquel le niveau de puissance acoustique ou le niveau d'énergie acoustique est calculé, menant à des résultats présentant une précision de classe 1.
Les méthodes spécifiées dans l'ISO 3745:2003 s'appliquent aux mesurages de tous types de bruit.
La source de bruit peut être un dispositif, une machine, un composant ou un sous-ensemble. La taille maximale de la source soumise à l'essai dépend du rayon de la sphère fictive (ou de l'hémisphère) utilisée comme surface de mesurage enveloppant la source.

Akustika - Ugotavljanje ravni zvočnih moči virov hrupa - Precizijska metoda za gluhe in polgluhe prostore (ISO 3745:2003)

General Information

• Status: Withdrawn
• Publication Date: 28-Jul-2009
• Withdrawal Date: 14-Mar-2012
• ICS: 17.120.10 - Flow in closed conduits
• ICS: 17.140.01 - Acoustic measurements and noise abatement in general
• Technical Committee: CEN/TC 211 - Acuostics
• Drafting Committee: CEN/TC 211 - Acuostics
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Start Date: 15-Mar-2012
• Completion Date: 15-Mar-2012
• Directive: 2006/42/EC - Directive 2006/42/EC of the European Parliament and of the Council of 17 May 2006 on machinery, and amending Directive 95/16/EC (recast)
• Directive: 98/37/EC - Machinery
• Mandate: M/BC/CEN/88/13 - Standardization request to CEN/CENELEC relating to machinery
• Ref Project: SIST EN ISO 3745:2009 - Acoustics - Determination of sound power levels of noise sources using sound pressure - Precision methods for anechoic and semi-anechoic rooms (ISO 3745:2003)

Relations

• Replaces: EN ISO 3745:2003/AC:2006 - Acoustics - Determination of sound power levels of noise sources using sound pressure - Precision methods for anechoic and hemi-anechoic rooms (ISO 3745:2003)
• Effective Date: 01-Aug-2009
• Replaces: EN ISO 3745:2003 - Acoustics - Determination of sound power levels of noise sources using sound pressure - Precision methods for anechoic and semi-anechoic rooms (ISO 3745:2003)
• Effective Date: 24-Dec-2008
• Replaced By: EN ISO 3745:2012 - Acoustics - Determination of sound power levels and sound energy levels of noise sources using sound pressure - Precision methods for anechoic rooms and hemi-anechoic rooms (ISO 3745:2012)
• Effective Date: 28-Mar-2012

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 3745:2009
01-november-2009
1DGRPHãþD
SIST EN ISO 3745:2004
SIST EN ISO 3745:2004/AC:2006
$NXVWLND8JRWDYOMDQMHUDYQL]YRþQLKPRþLYLURYKUXSD3UHFL]LMVNDPHWRGD]D
JOXKHLQSROJOXKHSURVWRUH,62
Acoustics - Determination of sound power levels of noise sources using sound pressure -
Precision methods for anechoic and semi-anechoic rooms (ISO 3745:2003)
Akustik - Bestimmung der Schallleistungspegel von Geräuschquellen aus
Schalldruckmessungen - Verfahren der Genauigkeitsklasse 1 für reflexionsarme Räume
und Halbräume (ISO 3745:2003)
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 (ISO 3745:2003)
Ta slovenski standard je istoveten z: EN ISO 3745:2009
ICS:
17.140.01 $NXVWLþQDPHUMHQMDLQ Acoustic measurements and
EODåHQMHKUXSDQDVSORãQR noise abatement in general
91.120.20 $NXVWLNDYVWDYEDK=YRþQD Acoustics in building. Sound
L]RODFLMD insulation
SIST EN ISO 3745:2009 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 3745:2009

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SIST EN ISO 3745:2009
EUROPEAN STANDARD
EN ISO 3745
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2009
ICS 17.140.01 Supersedes EN ISO 3745:2003
English Version
Acoustics - Determination of sound power levels of noise
sources using sound pressure - Precision methods for anechoic
and semi-anechoic rooms (ISO 3745:2003)
Acoustique - Détermination des niveaux de puissance Akustik - Bestimmung der Schallleistungspegel von
acoustique émis par les sources de bruit à partir de la Geräuschquellen aus Schalldruckmessungen - Verfahren
pression acoustique - Méthodes de laboratoire pour les der Genauigkeitsklasse 1 für reflexionsarme Räume und
salles anéchoïques et semi-anéchoïques (ISO 3745:2003) Halbräume (ISO 3745:2003)
This European Standard was approved by CEN on 13 July 2009.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the CEN Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2009 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 3745:2009: E
worldwide for CEN national Members.

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SIST EN ISO 3745:2009
EN ISO 3745:2009 (E)
Contents Page
Foreword .3
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 98/37/EC .4
Annex ZB (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 2006/42/EC .5

2

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SIST EN ISO 3745:2009
EN ISO 3745:2009 (E)
Foreword
The text of ISO 3745:2003 has been prepared by Technical Committee ISO/TC 43 “Acoustics” of the
International Organization for Standardization (ISO) and has been taken over as EN ISO 3745:2009 by
Technical Committee CEN/TC 211 “Acoustics” the secretariat of which is held by DS.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by January 2010, and conflicting national standards shall be withdrawn at
the latest by January 2010.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all suc
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