EN ISO 3747:2009
(Main)Acoustics - Determination of sound power levels of noise sources using sound pressure - Comparison method in situ (ISO 3747:2000)
Acoustics - Determination of sound power levels of noise sources using sound pressure - Comparison method in situ (ISO 3747:2000)
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Akustik - Bestimmung der Schallleistungspegel von Geräuschquellen aus Schalldruckmessungen -Vergleichsverfahren zur Verwendung unter Einsatzbedingungen (ISO 3747:2000)
1.1 Diese Internationale Norm legt ein Verfahren zur Bestimmung der Schallleistungspegel von insbesondere
ortsfesten Schallquellen unter Einsatzbedingungen fest. Es wird ein Vergleichsverfahren verwendet,
und alle Messungen werden in Oktavbändern durchgeführt. Die Messunsicherheit hängt von der
Prüfumgebung ab. Die Messunsicherheit wird durch Vergleich mit einem Indikator beurteilt, der die räumliche
Schallverteilung beschreibt. Die Genauigkeit des Verfahrens entspricht entweder Genauigkeitsklasse
2 oder Genauigkeitsklasse 3.
Der Schallleistungspegel der zu untersuchenden Quelle wird aus den gemessenen Werten der Schalldruckpegel
berechnet, die von der Quelle bzw. einer Vergleichsschallquelle an festgelegten Messpunkten
erzeugt werden. Zur Berechnung des Schallleistungspegels werden die kalibrierten Werte der Vergleichsschallquelle
verwendet sowie die Differenzen zwischen den Werten, die mit der zu untersuchenden
Quelle und der Vergleichsschallquelle ermittelt wurden. Alle Berechnungen werden in Oktavbändern
durchgeführt, aus welchen der A-bewertete Schallleistungspegel bestimmt wird.
ANMERKUNG Für transportable Schallquellen können entsprechende andere Normen aus der Reihe ISO 3740
und folgende angewendet werden.
1.2 Diese Internationale Norm ist in allen Prüfumgebungen außerhalb von Laboren anwendbar, sofern
der Fremdgeräuschpegel ausreichend niedrig ist und der Schalldruckpegel an den Mikrofonpositionen
hauptsächlich von Reflexionen an den Raumwänden abhängt.
ANMERKUNG In ISO 3744 oder ISO 9614 werden alternative Verfahren angeboten.
1.3 Diese Internationale Norm ist in erster Linie für Quellen anwendbar, die breitbandigen Schall
abstrahlen. Sie kann jedoch auch für Quellen verwendet werden, die Schmalbandgeräusch oder Einzelt
öne abstrahlen, obwohl die Messunsicherheit dann größer als hier angegeben ausfallen könnte.
ANMERKUNG Für Geräuschquellen, die ein stationäres Geräusch abstrahlen, darf alternativ ISO 9614 angewendet
werden.
Acoustique - Détermination des niveaux de puissance acoustique émis par les sources de bruit à partir de la pression acoustique - Méthode de comparaison pour une utilisation in situ (ISO 3747:2000)
La présente Norme internationale s'applique à tous les types d'environnements d'essai autres que celui rencontré en laboratoire, à condition que le niveau de bruit de fond soit suffisamment faible et que le niveau de pression acoustique aux différentes positions de microphone dépende principalement des réflexions par les surfaces de la salle.
NOTE L'ISO 3744 ou l'ISO 9614 peut fournir des méthodes alternatives. La présente Norme internationale s'applique principalement aux sources qui émettent un bruit à large bande. Cependant, elle peut également s'appliquer aux sources qui émettent un bruit à bande étroite ou des sons purs, bien que l'incertitude de mesure puisse alors devenir plus importante que celle indiquée ici.
NOTE L'ISO 9614 peut être utilisée comme norme alternative pour les sources de bruit qui émettent un bruit stable.
Akustika - Ugotavljanje ravni zvočnih moči virov hrupa z zvočnim tlakom - Primerjalna metoda in situ (ISO 3747:2000)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-november-2009
1DGRPHãþD
SIST EN ISO 3747:2001
$NXVWLND8JRWDYOMDQMHUDYQL]YRþQLKPRþLYLURYKUXSD]]YRþQLPWODNRP
3ULPHUMDOQDPHWRGDLQVLWX ,62
Acoustics - Determination of sound power levels of noise sources using sound pressure -
Comparison method in situ (ISO 3747:2000)
Akustik - Bestimmung der Schalleistungspegel von Geräuschquellen aus
Schalldruckmessungen -Vergleichsverfahren zur Verwendung unter Einsatzbedingungen
(ISO 3747:2000)
Acoustique - Détermination des niveaux de puissance acoustique émis par les sources
de bruit à partir de la pression acoustique - Méthode de comparaison pour une utilisation
in situ (ISO 3747:2000)
Ta slovenski standard je istoveten z: EN ISO 3747:2009
ICS:
17.140.01 $NXVWLþQDPHUMHQMDLQ Acoustic measurements and
EODåHQMHKUXSDQDVSORãQR noise abatement in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN ISO 3747
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2009
ICS 17.140.01 Supersedes EN ISO 3747:2000
English Version
Acoustics - Determination of sound power levels of noise
sources using sound pressure - Comparison method in situ (ISO
3747:2000)
Acoustique - Détermination des niveaux de puissance Akustik - Bestimmung der Schalleistungspegel von
acoustique émis par les sources de bruit à partir de la Geräuschquellen aus Schalldruckmessungen -
pression acoustique - Méthode de comparaison pour une Vergleichsverfahren zur Verwendung unter
utilisation in situ (ISO 3747:2000) Einsatzbedingungen (ISO 3747:2000)
This European Standard was approved by CEN on 20 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 3747:2009: E
worldwide for CEN national Members.
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
Foreword
The text of ISO 3747:2000 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 3747:2009 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 February 2010, and conflicting national standards shall be withdrawn
at the latest by February 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 such patent rights.
This document supersedes EN ISO 3747:2000.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EC Directives.
For relationship with EC Directives, see informative Annexes ZA and ZB, which are integral parts of this
document.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: 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 the United Kingdom.
Endorsement notice
The text of ISO 3747:2000 has been approved by CEN as a EN ISO 3747:2009 without any modification.
Annex ZA
(informative)
Relationship between this European Standard and the Essential
Requirements of EU Directive 98/37/EC
This European Standard has been prepared under a mandate given to CEN by the European Commission
and the European Free Trade Association to provide a means of conforming to Essential Requirements of the
New Approach Directive 98/37/EC, amended by 98/79/EC on machinery.
Once this standard is cited in the Official Journal of the European Communities under that Directive and has
been implemented as a national standard in at least one Member State, compliance with the normative
clauses of this standard confers, within the limits of the scope of this standard, a presumption of conformity
with the relevant Essential Requirements of that Directive and associated EFTA regulations.
WARNING - Other requirements and other EU Directives may be applicable to the product(s) falling within the
scope of this standard.
Annex ZB
(informative)
Relationship between this European Standard and the Essential
Requirements of EU Directive 2006/42/EC
This European Standard has been prepared under a mandate given to CEN by the European Commission
and the European Free Trade Association to provide a means of conforming to Essential Requirements of the
New Approach Directive 2006/42/EC on machinery.
Once this standard is cited in the Official Journal of the European Communities under that Directive and has
been implemented as a national standard in at least one Member State, compliance with the normative
clauses of this standard confers, within the limits of the scope of this standard, a presumption of conformity
with the relevant Essential Requirements of that Directive and associated EFTA regulations.
WARNING — Other requirements and other EU Directives may be applicable to the product(s) falling within
the scope of this standard.
INTERNATIONAL ISO
STANDARD 3747
Second edition
2000-07-01
Acoustics — Determination of sound power
levels of noise sources using sound
pressure — Comparison method in situ
Acoustique — Détermination des niveaux de puissance acoustique émis
par les sources de bruit à partir de la pression acoustique — Méthode de
comparaison in situ
Reference number
ISO 3747:2000(E)
©
ISO 2000
ISO 3747:2000(E)
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ISO 3747:2000(E)
Contents Page
Foreword.iv
Introduction.v
1 Scope .1
2 Normative references .1
3 Terms and definitions .2
4 Test methodology.3
4.1 General.3
4.2 Accuracy.3
5 Measurement uncertainty .3
6 Instrumentation.4
6.1 Instrumentation system .4
6.2 Calibration .4
7 Operating conditions of the source under test .5
8 Preliminary survey.6
8.1 Background noise.6
8.2 Characterization of the source under test .6
9 Positions of the reference sound source.6
9.1 One position.6
9.2 More than one position .6
10 Measurement procedure .7
10.1 Selection of microphone positions.7
10.2 Measurements.8
10.3 Correction for background noise.8
10.4 Evaluation of the measurement uncertainty.9
11 Calculation of sound power levels.9
11.1 One RSS position.9
11.2 Several RSS positions.9
11.3 A-weighted sound power level.9
12 Information to be recorded .10
13 Information to be reported.11
Annex A (normative) Evaluation of�L and of the measurement uncertainty.12
f
Annex B (informative) Recommendations for the location of the reference sound source and the
microphones, if only one RSS position is used .
...
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