1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 3747:2010Acoustics Determinationof sound power levels andsound energy levels of noisesources using sound pressure Engineering/survey methodsfor use in situ in a reverbe
2、rantenvironment (ISO 3747:2010)BS EN ISO 3747:2010 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO 3747:2010.It supersedes BS EN ISO 3747:2009 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee EH/1/4, Machinery no
3、ise.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2011ISBN 978 0 580 53883 4ICS 17.140.01Compliance with a
4、British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 January 2011.Amendments issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 3747 De
5、cember 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 - Dtermination des n
6、iveaux de puissance acoustique et des niveaux dnergie acoustique mis par les sources de bruit partir de la pression acoustique - Mthode dexpertise et de contrle pour une utilisation in situ en environnement rverbrant (ISO 3747:2010) Akustik - Bestimmung der Schallleistungs- und Schallenergiepegel vo
7、n Geruschquellen 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 stipul
8、ate 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 St
9、andard 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 n
10、ational 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, Swit
11、zerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR 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.
12、 EN ISO 3747:2010: EBS EN ISO 3747:2010EN ISO 3747:2010 (E) 3 Foreword This document (EN ISO 3747:2010) has been prepared by Technical Committee ISO/TC 43 “Acoustics“ in collaboration with Technical Committee CEN/TC 211 “Acoustics” the secretariat of which is held by DS. This European Standard shall
13、 be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by June 2011, and conflicting national standards shall be withdrawn at the latest by June 2011. Attention is drawn to the possibility that some of the elements of this document ma
14、y 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 3747:2009. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Associatio
15、n, and supports essential requirements of EU Directive(s). For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to impl
16、ement this European Standard: 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, Sw
17、itzerland and the United Kingdom. Endorsement notice The text of ISO 3747:2010 has been approved by CEN as a EN ISO 3747:2010 without any modification. BS EN ISO 3747:2010EN ISO 3747:2010 (E) 4 Annex ZA (informative) Relationship between this European Standard and the Essential Requirements of EU Di
18、rective 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
19、 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 corresp
20、onding 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. BS EN ISO 3747:2010ISO 3747:2010(E) ISO 2010 All rights reserved iiiContents Page Forewor
21、d iv Introduction.v 1 Scope1 2 Normative references2 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 level
22、s.11 9 Measurement uncertainty.15 10 Information to be recorded.18 11 Test report20 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 positi
23、on 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)
24、 Guidance on the development of information on measurement uncertainty.31 Bibliography42 BS EN ISO 3747:2010ISO 3747:2010(E) iv ISO 2010 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). Th
25、e 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-gov
26、ernmental, 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.
27、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 vo
28、te. 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
29、 third edition cancels and replaces the second edition (ISO 3747:2000), which has been technically revised. BS EN ISO 3747:2010ISO 3747:2010(E) ISO 2010 All rights reserved vIntroduction This International Standard is one of the series ISO 37412to ISO 3747, which specify various methods for determin
30、ing 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 l
31、evel and on the facilities available. General guidelines to assist in the selection are provided in ISO 37401. ISO 37401to 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
32、 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 s
33、ound 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
34、 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-
35、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. Fo
36、r applications where greater accuracy is required, reference can be made to ISO 37412, ISO 37445or an appropriate part of ISO 961417-19. If the relevant criteria for the measurement environment specified in this International Standard are not met, it might be possible to refer to another standard fr
37、om this series, or to an appropriate part of ISO 961417-19. BS EN ISO 3747:2010BS EN ISO 3747:2010INTERNATIONAL STANDARD ISO 3747:2010(E) ISO 2010 All rights reserved 1Acoustics Determination of sound power levels and sound energy levels of noise sources using sound pressure Engineering/survey metho
38、ds for use in situ in a reverberant environment 1 Scope 1.1 General This International Standard 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 s
39、itu 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 measureme
40、nts. The sound power level or sound energy level with frequency A-weighting applied is calculated using the octave-band levels. 1.2 Types of noise and noise sources The method specified in this International Standard is suitable for all types of noise (steady, non-steady, fluctuating, isolated burst
41、s 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 possibility that the measurement reproducibility is then degraded. T
42、he noise source under test can be a device, machine, component or sub-assembly, especially one which is non-movable. 1.3 Test environment The test environment that is applicable for measurements made in accordance with this International Standard is a room where the sound pressure level at the micro
43、phone positions depends mainly on reflections from the room surfaces (see 4.1). 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 (see 4.2). 1.4 Measurement uncertain
44、ty Information is given on the uncertainty of the sound power levels and sound energy levels determined in accordance with this International Standard, for measurements made in octave bands and for A-weighted frequency calculations performed on them. The uncertainty conforms with that of either ISO
45、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. BS EN ISO 3747:2010ISO 3747:2010(E) 2 ISO 2010 All rights reserved2 Normative references The following refer
46、enced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 5725 (all parts), Accuracy (trueness and precision) of measureme
47、nt methods and results ISO 6926, Acoustics Requirements for the performance and calibration of reference sound sources used for the determination of sound power levels ISO 12001:1996, Acoustics Noise emitted by machinery and equipment Rules for the drafting and presentation of a noise test code ISO/
48、IEC Guide 98-3, Uncertainty of measurement Part 3: Guide to the expression of uncertainty in measurement (GUM:1995) IEC 60942:2003, Electroacoustics Sound calibrators IEC 61260:1995, Electroacoustics Octave-band and fractional-octave-band filters IEC 61672-1:2002, Electroacoustics Sound level meters
49、 Part 1: Specifications 3 Terms and definitions For the purposes of this document, the following definitions apply. 3.1 sound pressure p difference between instantaneous pressure and static pressure NOTE 1 Adapted from ISO 80000-8:200722, 8-9.2. NOTE 2 Sound pressure is expressed in pascals. 3.2 sound pressure level Lpten times the logarithm to the base 10 of the ratio of the square of the sound pressure, p, to the square of a reference value, p0, expressed in decibels: 22010 lg dBppLp= (1) where the refere
