Acoustics - Determination of sound power levels and sound energy levels of noise sources using sound pressure - Engineering/survey methods for use in situ in a reverberant environment (ISO 3747:2010)

ISO 3747:2010 specifies a method for determining the sound power level or sound energy level of a noise source by comparing measured sound pressure levels emitted by a noise source (machinery or equipment) mounted in situ in a reverberant environment, with those from a calibrated reference sound source. The sound power level (or, in the case of noise bursts or transient noise emission, the sound energy level) produced by the noise source, in frequency bands of width one octave, is calculated using those measurements. The sound power level or sound energy level with frequency A-weighting applied is calculated using the octave-band levels.
The method specified in ISO 3747:2010 is suitable for all types of noise (steady, non-steady, fluctuating, isolated bursts of sound energy, etc.) defined in ISO 12001. The method is primarily applicable to sources which emit broad-band noise. It can, however, also be used for sources which emit narrow-band noise or discrete tones, although there is a possiblity that the measurement reproducibility is then degraded.
The noise source under test can be a device, machine, component or sub-assembly, especially one which is non-movable.
The test environment that is applicable for measurements made in accordance with ISO 3747:2010 is a room where the sound pressure level at the microphone positions depends mainly on reflections from the room surfaces. In measurements of ISO 12001:1996, accuracy grade 2 (engineering grade), background noise in the test environment is low compared to that of the noise source or reference sound source.
Information is given on the uncertainty of the sound power levels and sound energy levels determined in accordance with ISO 3747:2010, for measurements made in octave bands and for A-weighted frequency calculations performed on them. The reproducibility conforms with that of either ISO 12001:1996, accuracy grade 2 (engineering grade) or ISO 12001:1996, accuracy grade 3 (survey grade), depending on the extent to which the requirements concerning the test environment are met.

Akustik - Bestimmung der Schallleistungs- und Schallenergiepegel von Geräuschquellen aus Schalldruckmessungen - Verfahren der Genauigkeitsklassen 2 und 3 zur Anwendung in situ in einer halligen Umgebung (ISO 3747:2010)

1.1 Allgemeines
Diese Internationale Norm legt ein Verfahren für die Bestimmung des Schallleistungs- oder Schallenergiepegels
einer Geräuschquelle fest, bei dem die von einer Geräuschquelle (Maschine oder Gerät) an
ihrem üblichen Aufstellungsort (in situ) erzeugten und in einer halligen Umgebung gemessenen Schalldruckpegel
mit denen von einer kalibrierten Vergleichsschallquelle verglichen werden. Der von der Geräuschquelle
erzeugte Schallleistungspegel (oder der Schallenergiepegel bei Impulsen oder anderen Geräuschen kurzer
Dauer) wird aus diesen Messungen in Oktavbändern berechnet. Der A-bewertete Schallleistungs- oder
Schallenergiepegel wird aus den Oktavbandpegeln berechnet.
1.2 Art der Geräusche und Geräuschquellen
Das in dieser Internationalen Norm festgelegte Verfahren ist für alle in ISO 12001 definierten Arten von
Geräuschen geeignet (gleichförmige, ungleichförmige, schwankende, Einzel-Schallimpulse usw.). Das
Verfahren ist vorrangig auf Quellen anwendbar, die ein breitbandiges Geräusch abstrahlen. Es darf jedoch
auch für Quellen benutzt werden, die ein schmalbandiges Geräusch oder Einzeltöne abstrahlen, obwohl dann
die Möglichkeit besteht, dass die Vergleichbarkeit der Messung herabgesetzt ist.
Die zu untersuchende Geräuschquelle kann ein Gerät, eine Maschine, Komponente oder Baugruppe sein,
insbesondere eine, die nicht fortbewegt werden kann.
1.3 Messumgebung
Die für Messungen nach dieser Internationalen Norm verwendbare Messumgebung ist ein Raum, in dem der
Schalldruckpegel an den Mikrofonpositionen hauptsächlich durch die Reflexionen an den Oberflächen des
Raumes bestimmt wird (siehe 4.1). Bei Messungen mit der Genauigkeitsklasse 2 nach ISO 12001:1996 muss
der Fremdgeräuschpegel in der Messumgebung notwendigerweise niedrig im Vergleich zu dem der
Geräuschquelle oder der Vergleichsschallquelle sein (siehe 4.2).

Acoustique - Détermination des niveaux de puissance acoustique et des niveaux d'énergie acoustique émis par les sources de bruit à partir de la pression acoustique - Méthode d'expertise et de contrôle pour une utilisation in situ en environnement réverbérant (ISO 3747:2010)

L'ISO 3747:2010 spécifie une méthode de détermination du niveau de puissance acoustique ou du niveau d'énergie acoustique d'une source de bruit en comparant les niveaux de pression acoustique mesurés émis par une source de bruit (machine ou équipement) montée in situ dans un environnement réverbérant, à ceux d'une source sonore de référence étalonnée. Le niveau de puissance acoustique (ou, dans le cas d'impulsions sonores ou d'émissions sonores transitoires, le niveau d'énergie acoustique) produit par la source de bruit, par bandes de fréquences d'une largeur égale à une octave, est calculé en utilisant ces mesurages. Le niveau de puissance acoustique ou le niveau d'énergie acoustique avec la pondération fréquentielle A appliquée sont calculés au moyen des niveaux par bande d'octave.
La méthode spécifiée dans l'ISO 3747:2010 est applicable à tous les types de bruit (stable, non stable, fluctuant, impulsions acoustiques isolées, etc.) définis dans l'ISO 12001. Elle 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 la reproductibilité du mesurage puisse s'en trouver réduite.
La source de bruit en essai peut être un dispositif, une machine, un composant ou un sous-ensemble, en particulier ceux ne pouvant pas être déplacés.
L'environnement d'essai applicable aux mesurages réalisés conformément à l'ISO 3747:2010 est une salle dans laquelle le niveau de pression acoustique aux différentes positions de microphone dépend principalement des réflexions par les surfaces de la salle. Dans les mesurages de classe de précision expertise (classe 2) telle que spécifiée dans l'ISO 12001:1996, le bruit de fond dans l'environnement d'essai est faible par comparaison avec celui de la source de bruit ou de la source sonore de référence.
Des informations sont données sur l'incertitude associée aux niveaux de puissance acoustique et aux niveaux d'énergie acoustique déterminés conformément à l'ISO 3747:2010, pour des mesurages effectués dans des bandes d'octave, ainsi que pour les niveaux pondérés A calculés à partir de ces mesures. La reproductibilité est conforme à la classe de précision expertise (classe 2) ou à la classe de précision contrôle (classe 3) telles que définies dans l'ISO 12001:1996, en fonction du degré de conformité aux exigences relatives à l'environnement d'essai.

Akustika - Določanje ravni zvočnih moči in in ravni zvočne energije virov hrupa z zvočnim tlakom - Inženirska/informativna metoda za uporabo na kraju samem (in situ) v odmevnem okolju (ISO 3747:2010)

Ta mednarodni standard opredeljuje metodo določanja ravni zvočnih moči ali ravni zvočne energije virov hrupa s primerjavo izmerjenih ravni zvočnih moči, ki jih oddaja vir hrupa (stroj ali oprema), nameščen na kraju samem v odmevnem okolju, s tistimi iz kalibriranega referenčnega vira hrupa. Raven moči zvoka (ali, v primeru prodorov hrupa ali prehodnih emisij hrupa, raven zvočne energije), ki jo proizvede vir hrupa v frekvenčnih pasovih širine ene oktave, je izračunana z uporabo teh merjenj. Raven moči zvoka ali raven energije zvoka, pri kateri je uporabljeno frekvenčno uteženje A, se izračuna z uporabo ravni oktavnega pasu.

General Information

Status
Published
Publication Date
30-Nov-2010
Withdrawal Date
29-Jun-2011
Technical Committee
Drafting Committee
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Start Date
01-Dec-2010
Due Date
19-Jun-2010
Completion Date
01-Dec-2010

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Akustik - Bestimmung der Schallleistungs- und Schallenergiepegel von Geräuschquellen aus Schalldruckmessungen - Verfahren der Genauigkeitsklassen 2 und 3 zur Anwendung in situ in einer halligen Umgebung (ISO 3747:2010)Acoustique - Détermination des niveaux de puissance acoustique et des niveaux d'énergie acoustique émis par les sources de bruit à partir de la pression acoustique - Méthode d'expertise et de contrôle pour une utilisation in situ en environnement réverbérant (ISO 3747:2010)Acoustics - Determination of sound power levels and sound energy levels of noise sources using sound pressure - Engineering/survey methods for use in situ in a reverberant environment (ISO 3747:2010)17.140.01Acoustic measurements and noise abatement in generalICS:Ta slovenski standard je istoveten z:EN ISO 3747:2010SIST EN ISO 3747:2011en01-marec-2011SIST EN ISO 3747:2011SLOVENSKI
STANDARDSIST EN ISO 3747:20091DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN ISO 3747
December 2010 ICS 17.140.01 Supersedes EN ISO 3747:2009English Version
Acoustics - Determination of sound power levels and sound energy levels of noise sources using sound pressure - Engineering/survey methods for use in situ in a reverberant environment (ISO 3747:2010)
Acoustique - Détermination des niveaux de puissance acoustique et des niveaux d'énergie acoustique émis par les sources de bruit à partir de la pression acoustique - Méthode d'expertise et de contrôle pour une utilisation in situ en environnement réverbérant (ISO 3747:2010)
Akustik - Bestimmung der Schallleistungs- und Schallenergiepegel von Geräuschquellen aus Schalldruckmessungen - Verfahren der Genauigkeitsklassen 2 und 3 zur Anwendung in situ in einer halligen Umgebung (ISO 3747:2010) This European Standard was approved by CEN on 6 November 2010.
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-CENELEC 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-CENELEC Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, 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 © 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 3747:2010: ESIST EN ISO 3747:2011

Relationship between this European Standard and the Essential Requirements of EU Directive 2006/42/EC .4 SIST EN ISO 3747:2011

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 Union 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 corresponding 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.
Reference numberISO 3747:2010(E)© ISO 2010
INTERNATIONAL STANDARD ISO3747Third edition2010-12-01Acoustics — Determination of sound power levels and sound energy levels of noise sources using sound pressure —Engineering/survey methods for use in situ in a reverberant environment Acoustique — Détermination des niveaux de puissance acoustique et des niveaux d'énergie acoustique émis par les sources de bruit à partir de la pression acoustique — Méthode d'expertise et de contrôle pour une utilisation in situ en environnement réverbérant
ISO 3747:2010(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.
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ISO 2010 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISO's member body in the country of the requester. ISO copyright office Case postale 56 • CH-1211 Geneva 20 Tel.
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ii © ISO 2010 – All rights reserved
ISO 3747:2010(E) © ISO 2010 – All rights reserved iii Contents Page Foreword.iv Introduction.v 1 Scope.1 2 Normative references.2 3 Terms and definitions.2 4 Test environment.6 5 Instrumentation and measurement equipment.6 6 Location, installation and operation of noise source under test.7 7 Measurement procedure.8 8 Calculation of sound power levels and sound energy levels.11 9 Measurement uncertainty.15 10 Information to be recorded.18 11 Test report.20 Annex A (normative)
Evaluation of the excess of sound pressure level at a given distance.21 Annex B (informative)
Recommendations for the location of the reference sound source and the microphones, if only one position is used for the reference sound source.22 Annex C (normative)
Sound power level and sound energy level under reference meteorological conditions.27 Annex D (normative)
Calculation of A-weighted sound power levels and A-weighted sound energy levels from octave-band levels.29 Annex E (informative)
Guidance on the development of information on measurement uncertainty.31 Bibliography.42
ISO 3747:2010(E) iv © ISO 2010 – All rights reserved Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 3747 was prepared by Technical Committee ISO/TC 43, Acoustics, Subcommittee SC 1, Noise. This third edition cancels and replaces the second edition (ISO 3747:2000), which has been technically revised. SIST EN ISO 3747:2011

ISO 3747:2010(E) © ISO 2010 – All rights reserved v Introduction This International Standard is one of the series ISO 3741[2] to ISO 3747, which specify various methods for determining the sound power levels and sound energy levels of noise sources including machinery, equipment and their sub-assemblies. The selection of one of the methods from the series for use in a particular application depends on the purpose of the test to determine the sound power level or sound energy level and on the facilities available. General guidelines to assist in the selection are provided in ISO 3740[1]. ISO 3740[1] to ISO 3747 give only general principles regarding the operating and mounting conditions of the machinery or equipment for the purposes of the test. It is important that test codes be established for individual kinds of noise source, in order to give detailed requirements for mounting, loading, and operating conditions under which the sound power levels or sound energy levels are to be obtained. The method given in this International Standard is based on a comparison of the sound pressure levels in octave frequency bands of a noise source under test with those of a calibrated reference sound source; A-weighted sound power levels or sound energy levels may be calculated from the octave-band levels. The method is applied where the noise source is found in situ and as such is suitable for larger pieces of stationary equipment which, due to their manner of operation or installation, cannot readily be moved. The method specified in this International Standard permits the determination of the sound power level and the sound energy level in octave bands from which the A-weighted value is calculated. This International Standard describes a method giving results of either ISO 12001:1996, accuracy grade 2 (engineering grade) or ISO 12001:1996, accuracy grade 3 (survey grade), depending on the extent to which the requirements concerning the test environment are met. For applications where greater accuracy is required, refere
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