DIN EN ISO 3741-2011 Acoustics - Determination of sound power levels and sound energy levels of noise sources using sound pressure - Precision methods for reverberation test rooms .pdf

1、January 2011 Translation by DIN-Sprachendienst.English price group 25No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).IC

2、S 17.140.01!$m2:“1741523www.din.deDDIN EN ISO 3741Acoustics Determination of sound power levels and sound energy levels of noisesources using sound pressure Precision methods for reverberation test rooms (ISO 3741:2010)English translation of DIN EN ISO 3741:2011-01Akustik Bestimmung der Schallleistu

3、ngs- und Schallenergiepegel von Geruschquellen ausSchalldruckmessungen Hallraumverfahren der Genauigkeitsklasse 1 (ISO 3741:2010)Englische bersetzung von DIN EN ISO 3741:2011-01Acoustique Dtermination des niveaux de puissance et des niveaux dnergie acoustiques mis parles sources de bruit partir de l

4、a pression acoustique Mthodes de laboratoire en salles dessais rverbrantes (ISO 3741:2010)Traduction anglaise de DIN EN ISO 3741:2011-01SupersedesDIN EN ISO 3741:2009-11www.beuth.deDocument comprises pagesIn case of doubt, the German-language original shall be considered authoritative.7002.11 DIN EN

5、 ISO 3741:2011-01 2 A comma is used as the decimal marker. National foreword This standard has been prepared by Technical Committee ISO/TC 43 “Acoustics”, Subcommittee SC 1 “Noise” (Secretariat: DS, Denmark), Working Group WG 28 “Basic machinery noise emission standards” in collaboration with Techni

6、cal Committee CEN/TC 211 “Acoustics” (Secretariat: DS, Denmark). The responsible German body involved in its preparation was the Normenausschuss Akustik, Lrmminderung und Schwingungstechnik im DIN und VDI (Acoustics, Noise Control and Vibration Engineering Standards Committee in DIN and VDI), Workin

7、g Committee NA 001-01-04 AA Geruschemission von Maschinen und Anlagen; Messung, Minderung, Datensammlung. The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 354 DIN EN ISO 354 ISO 3382-2 DIN EN ISO 3382-2 ISO 3740 DIN EN ISO 3740 ISO 3743-

8、1 DIN EN ISO 3743-1 ISO 3743-2 DIN EN ISO 3743-2 ISO 3744 DIN EN ISO 3744 ISO 3745 DIN EN ISO 3745 ISO 3746 DIN EN ISO 3746 ISO 3747 DIN EN ISO 3747 ISO 4871 DIN EN ISO 4871 ISO 5725 DIN ISO 5725 standards series standards series ISO 6926 DIN EN ISO 6926 ISO 7574-1 DIN EN 27574-1 ISO 7574-2 DIN EN 2

9、7574-2 ISO 7574-3 DIN EN 27574-3 ISO 7574-4 DIN EN 27574-4 ISO 9295 DIN EN 29295 ISO 9614-1 DIN EN ISO 9614-1 ISO 9614-2 DIN EN ISO 9614-2 ISO 9614-3 DIN EN ISO 9614-3 ISO 12001 DIN EN ISO 12001 ISO 80000-8 DIN EN ISO 80000-8 IEC 60942 DIN EN 60942 IEC 61183 DIN EN 61183 IEC 61260 DIN EN 61260 IEC 6

10、1672-1 DIN EN 61672-1 ISO/IEC Guide 98-3 DIN V ENV 13005 The national standards are given in Annex NA “Bibliography”. DIN EN ISO 3741:2011-01 3 Amendments This standard differs from DIN EN ISO 3741:2009-11 as follows: a) criteria and application of background noise correction have been rendered more

11、 precise; b) specifications relating to absolute criteria for background noise have been included; c) corrections with regard to meteorological conditions have been revised; d) the determination of sound energy levels has been included; e) specifications relating to the measurement uncertainty have

12、been extended following the approach described in ISO/IEC Guide 98-3 (GUM); f) specifications relating to the test room qualification procedure with regard to lower frequencies have been extended; g) Annex G “Guidelines on the development of information on measurement uncertainty” has been added; h)

13、 the standard has been editorially revised. Previous editions DIN 45635-2: 1977-12, 1987-10 DIN EN 23741: 1991-11 DIN EN 23742: 1991-11 DIN EN ISO 3741: 2001-01, 2009-11 DIN EN ISO 3741 Corrigendum 1: 2002-12 National Annex NA (informative) Bibliography DIN V ENV 13005, Guide to the expression of un

14、certainty in measurement DIN EN 27574-1, Acoustics tatistical methods for determining and verifying stated noise emission values of machinery and equipment Part 1: General considerations and definitions DIN EN 27574-2, Acoustics Statistical methods for determining and verifying stated noise emission

15、 values of machinery and equipment Part 2: Methods for stated values for individual machines DIN EN 27574-3, Acoustics Statistical methods for determining and verifying stated noise emission values of machinery and equipment Part 3: Simple (transition) method for stated values for batches of machine

16、s DIN EN 27574-4, Acoustics Statistical methods for determining and verifying stated noise emission values of machinery and equipment Part 4: Methods for stated values for batches of machines DIN EN 29295, Acoustics Measurement of high-frequency noise emitted by computer and business equipment SDIN

17、EN ISO 3741:2011-01 4 DIN EN 60942, Electroacoustics Sound calibrators DIN EN 61183, Electroacoustics Random-incidence and diffuse-field calibration of sound level meters DIN EN 61260, Electroacoustics Octave-band and fractional-octave-band filters DIN EN 61672-1, Electroacoustics Sound level meters

18、 Part 1: Specifications DIN EN ISO 354, Acoustics Measurement of sound absorption in a reverberation room DIN EN ISO 3382-2, Acoustics Measurement of room acoustic parameters Part 2: Reverberation time in ordinary rooms DIN EN ISO 3740, Acoustics Determination of sound power levels of noise sources

19、Guidelines for the use of basic standards DIN EN ISO 3743-1, Acoustics Determination of sound power levels of noise sources Engineering methods for small, movable sources in reverberant fields Part 1: Comparison method for hard-walled test rooms DIN EN ISO 3743-2, Acoustics Determination of sound po

20、wer levels of noise sources using sound pressure Engineering methods for small, movable sources in reverberant fields Part 2: Methods for special reverberation test rooms DIN EN ISO 3744, Acoustics Determination of sound power levels of noise sources using sound pressure Engineering method in an ess

21、entially free field over a reflecting plane DIN EN ISO 3745, Acoustics Determination of sound power levels and sound energy levels of noise sources using sound pressure Precision methods for anechoic and hemi-anechoic rooms DIN EN ISO 3746, Acoustics Determination of sound power levels of noise sour

22、ces using sound pressure Survey method using an enveloping measurement surface over a reflecting plane DIN EN ISO 3747, 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

23、DIN EN ISO 4871, Acoustics Declaration and verification of noise emission values of machinery and equipment DIN EN ISO 6926, Acoustics Requirements for the performance and calibration of reference sound sources used for the determination of sound power levels DIN EN ISO 9614-1, Acoustics Determinati

24、on of sound power levels of noise sources using sound intensity Part 1: Measurement at discrete points DIN EN ISO 9614-2, Acoustics Determination of sound power levels of noise sources using sound intensity Part 2: Measurement by scanning DIN EN ISO 9614-3, Acoustics Determination of sound power lev

25、els of noise sources using sound intensity Part 3: Precision method for measurement by scanning DIN EN ISO 12001, Acoustics Noise emitted by machinery and equipment Rules for the drafting and presentation of a noise test code DIN EN ISO 80000-8, Quantities and units Part 8: Acoustics DIN ISO 5725 (a

26、ll parts), Accuracy (trueness and precision) of measurement methods and results EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 3741 October 2010 ICS 17.140.01 Supersedes EN ISO 3741:2009English Version Acoustics - Determination of sound power levels and sound energy levels of noise sources

27、 using sound pressure - Precision methods for reverberation test rooms (ISO 3741:2010) Acoustique - Dtermination des niveaux de puissance et des niveaux dnergie acoustiques mis par les sources de bruit partir de la pression acoustique - Mthodes de laboratoire en salles dessais rverbrantes (ISO 3741:

28、2010) Akustik - Bestimmung der Schallleistungs- und Schallenergiepegel von Geruschquellen aus Schalldruckmessungen - Hallraumverfahren der Genauigkeitsklasse 1 (ISO 3741:2010) This European Standard was approved by CEN on 14 August 2010. CEN members are bound to comply with the CEN/CENELEC Internal

29、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.

30、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 a

31、re 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, Swed

32、en, Switzerland 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.

33、Ref. No. EN ISO 3741:2010: EContents DIN EN ISO 3741:2011-01 EN ISO 3741:2010 (E) 2 PageForeword3 Introduction .4 1 Scope 5 2 Normative references 6 3 Terms and definitions .6 4 Reference meteorological conditions .10 5 Reverberation test room .10 6 Instrumentation and measurement equipment 14 7 Def

34、inition, location, installation, and operation of noise source under test .14 8 Measurements in the reverberation test room .16 9 Determination of sound power levels and sound energy levels 23 10 Measurement uncertainty .31 11 Information to be recorded .34 12 Test report 35 Annex A (informative) Gu

35、idelines for the design of reverberation test rooms.36 Annex B (informative) Guidelines for the design of rotating diffusing vanes 38 Annex C (normative) Reverberation test room qualification procedure for the measurement of broad-band sound .39 Annex D (normative) Reverberation test room qualificat

36、ion procedure for the measurement of discrete-frequency components 41 Annex E (informative) Extension of frequency range to frequencies below 100 Hz 46 Annex F (normative) Calculation of octave band sound power levels and sound energy levels, A-weighted sound power levels and A-weighted sound energy

37、 levels from one-third-octave band levels .49 Annex G (informative) Guidelines on the development of information on measurement uncertainty52 Bibliography 64 Annex ZA (informative) Relationship between this European Standard and the Essential Requirements of EU Directive 2006/42/EC 66 Foreword The t

38、ext of ISO 3741:2010 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 3741:2010 by Technical Committee CEN/TC 211 “Acoustics” the secretariat of which is held by DS. This European Standard sha

39、ll be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by April 2011, and conflicting national standards shall be withdrawn at the latest by April 2011. Attention is drawn to the possibility that some of the elements of this documen

40、t 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 3741:2009. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Associ

41、ation, and supports essential requirements of EU Directive. For relationship with EU Directive, 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 implem

42、ent 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, Swit

43、zerland and the United Kingdom. Endorsement notice The text of ISO 3741:2010 has been approved by CEN as a EN ISO 3741:2010 without any modification. DIN EN ISO 3741:2011-01 EN ISO 3741:2010 (E) 3 Introduction This International Standard is one of the series ISO 37402to ISO 37478, which specify vari

44、ous 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

45、 level or sound energy level and on the facilities available. General guidelines to assist in the selection are provided in ISO 37402. ISO 37402to ISO 37478give only general principles regarding the operating and mounting conditions of the machinery or equipment for the purposes of the test. It is i

46、mportant 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 methods given in this International Standard require

47、the source under test to be mounted in a reverberation test room having specified acoustical characteristics. The methods are then based on the premise that the sound power or sound energy of the source under test is directly proportional to the mean-square sound pressure averaged in space and time,

48、 and otherwise depends only on the acoustical and geometric properties of the room and on the physical constants of air. For a source emitting sound in narrow bands of frequency or at discrete frequencies, a precise determination of the radiated sound power level or sound energy level in a reverbera

49、tion test room requires greater effort than for a source emitting sound more evenly over a wide range of frequencies, because: a) the space- and time-averaged sound pressure along a short microphone path, or as determined with an array of a small number of microphones, is not always a good estimate of the space- or time-averaged mean-square pressure throughout the room; b) the sound power or sound energy radiated by the source