1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Electroacoustics - Instruments for measurement of aircraft noise - Performance requirements for systems to measure sound pressure levels in noise certification of aircraftBS EN IEC 61265:2018EUROPEAN STANDARD NORME EURO
2、PENNE EUROPISCHE NORM EN IEC 61265 August 2018 ICS 17.140.50; 49.020 Supersedes EN 61265:1995 English Version Electroacoustics - Instruments for measurement of aircraft noise - Performance requirements for systems to measure sound pressure levels in noise certification of aircraft (IEC 61265:2018) l
3、ectroacoustique - Instruments pour la mesure du bruit des aronefs - Exigences relatives aux systmes de mesure des niveaux de pression acoustique pour la certification acoustique des aronefs (IEC 61265:2018) Elektroakustik - Gerte zur Messung des Geruschs von Luftfahrzeugen - Anforderungen an die Eig
4、enschaften von Systemen zur Messung von Schalldruckpegeln bei der Zertifizierung von Luftfahrzeugen (IEC 61265:2018) This European Standard was approved by CENELEC on 2018-06-12. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving t
5、his 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 CENELEC member. This European Standard exists in three offi
6、cial versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CENELEC members are the national electrotech
7、nical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania,
8、Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre: Rue de la Science 23, B-1040
9、Brussels 2018 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members. Ref. No. EN IEC 61265:2018 E National forewordThis British Standard is the UK implementation of EN IEC 61265:2018. It is identical to IEC 61265:2018. It supersedes BS EN 61265:1995,
10、which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee EPL/29, Electroacoustics.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a co
11、ntract. Users are responsible for its correct application. The British Standards Institution 2018 Published by BSI Standards Limited 2018ISBN 978 0 580 94660 8ICS 17.140.30; 49.020Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published und
12、er the authority of the Standards Policy and Strategy Committee on 31 August 2018.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN IEC 61265:2018EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN IEC 61265 August 2018 ICS 17.140.50; 49.020 Supersedes EN 61265:1
13、995 English Version Electroacoustics - Instruments for measurement of aircraft noise - Performance requirements for systems to measure sound pressure levels in noise certification of aircraft (IEC 61265:2018) lectroacoustique - Instruments pour la mesure du bruit des aronefs - Exigences relatives au
14、x systmes de mesure des niveaux de pression acoustique pour la certification acoustique des aronefs (IEC 61265:2018) Elektroakustik - Gerte zur Messung des Geruschs von Luftfahrzeugen - Anforderungen an die Eigenschaften von Systemen zur Messung von Schalldruckpegeln bei der Zertifizierung von Luftf
15、ahrzeugen (IEC 61265:2018) This European Standard was approved by CENELEC on 2018-06-12. CENELEC 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
16、 lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translati
17、on under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denma
18、rk, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Eur
19、opean Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels 2018 CENELEC All rights of exploitation in any form and by any means reserved wor
20、ldwide for CENELEC Members. Ref. No. EN IEC 61265:2018 E BS EN IEC 61265:2018EN IEC 61265:2018 2 European foreword The text of document 29/958/CDV, future edition 2 of IEC 61265, prepared by IEC/TC 29 “Electroacoustics“ was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN IEC
21、 61265:2018. The following dates are fixed: latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2019-03-12 latest date by which the national standards conflicting with the document have to be withdrawn (do
22、w) 2021-06-12 This document supersedes EN 61265:1995. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights. Endorsement notice The text of the Internat
23、ional Standard IEC 61265:2018 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following notes have to be added for the standards indicated: IEC 61094-4 NOTE Harmonized as EN 61094-4. IEC 61326-1:2012 NOTE Harmonized as EN 61326-
24、1:2013 (not modified). IEC 61000-4-2 NOTE Harmonized as EN 61000-4-2. IEC 61000-4-3 NOTE Harmonized as EN 61000-4-3. BS EN IEC 61265:2018EN IEC 61265:2018 3 Annex ZA (normative) Normative references to international publications with their corresponding European publications The following documents
25、are referred to in the text in such a way that some or all of their content constitutes requirements 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. NOTE 1 Where an Inter
26、national Publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here: www.cenelec.eu. Publication Year Title EN/HD Year IEC 60942 - Electro
27、acoustics - Sound calibrators EN IEC 60942 - IEC 61260-1 - Electroacoustics - Octave-band and fractional-octave-band filters - Part 1: Specifications EN 61260-1 - IEC 61672-1 - Electroacoustics - Sound level meters - Part 1: Specifications EN 61672-1 - BS EN IEC 61265:2018This page deliberately left
28、 blank 2 IEC 61265:2018 IEC 2018 CONTENTS FOREWORD . 4 INTRODUCTION . 6 1 Scope 7 2 Normative references 7 3 Terms and definitions 7 4 Purpose . 11 5 Requirements 12 5.1 General . 12 5.1.1 Output data . 12 5.1.2 Time-pressure history 12 5.1.3 Measurements of sound from aircraft ground power units 12
29、 5.1.4 Measurements of aircraft operations on the ground . 12 5.2 Measurement uncertainty 12 5.2.1 Relationship with regulatory requirements . 12 5.2.2 Performance verification 13 5.2.3 Periodic tests . 13 5.3 Reference environmental conditions . 13 5.4 Sound calibrator 13 5.5 Microphone system . 13
30、 5.5.1 Pressure and free-field type microphones 13 5.5.2 Grazing incidence microphone configuration 14 5.5.3 Ground plane microphone configuration . 15 5.5.4 Measurement configurations 16 5.6 Measurement system exclusive of the microphone 16 5.6.1 Frequency response 16 5.6.2 Level linearity 16 5.6.3
31、 Floating-range measurement systems . 17 5.7 Spectrum analysis system . 17 5.7.1 Third-octave analysis . 17 5.7.2 Time constants 17 5.7.3 Time offset 17 5.7.4 Anti-aliasing. 18 5.8 Readout device resolution . 18 5.9 Sensitivity to various environments . 18 5.9.1 General . 18 5.9.2 Atmospheric pressu
32、re 18 5.9.3 Air temperature 18 5.9.4 Humidity 19 5.9.5 Electromagnetic compatibility 19 Annex A (informative) Methods of testing the electroacoustical performance of a measurement system 20 A.1 General . 20 A.2 Operating conditions for test . 20 A.3 Sound calibrator 20 2 IEC 61265:2018 IEC 2018 CONT
33、ENTS FOREWORD . 4 INTRODUCTION . 6 1 Scope 7 2 Normative references 7 3 Terms and definitions 7 4 Purpose . 11 5 Requirements 12 5.1 General . 12 5.1.1 Output data . 12 5.1.2 Time-pressure history 12 5.1.3 Measurements of sound from aircraft ground power units 12 5.1.4 Measurements of aircraft opera
34、tions on the ground . 12 5.2 Measurement uncertainty 12 5.2.1 Relationship with regulatory requirements . 12 5.2.2 Performance verification 13 5.2.3 Periodic tests . 13 5.3 Reference environmental conditions . 13 5.4 Sound calibrator 13 5.5 Microphone system . 13 5.5.1 Pressure and free-field type m
35、icrophones 13 5.5.2 Grazing incidence microphone configuration 14 5.5.3 Ground plane microphone configuration . 15 5.5.4 Measurement configurations 16 5.6 Measurement system exclusive of the microphone 16 5.6.1 Frequency response 16 5.6.2 Level linearity 16 5.6.3 Floating-range measurement systems .
36、 17 5.7 Spectrum analysis system . 17 5.7.1 Third-octave analysis . 17 5.7.2 Time constants 17 5.7.3 Time offset 17 5.7.4 Anti-aliasing. 18 5.8 Readout device resolution . 18 5.9 Sensitivity to various environments . 18 5.9.1 General . 18 5.9.2 Atmospheric pressure 18 5.9.3 Air temperature 18 5.9.4
37、Humidity 19 5.9.5 Electromagnetic compatibility 19 Annex A (informative) Methods of testing the electroacoustical performance of a measurement system 20 A.1 General . 20 A.2 Operating conditions for test . 20 A.3 Sound calibrator 20 BS EN IEC 61265:2018IEC 61265:2018 IEC 2018 3 A.4 Microphone system
38、 frequency response . 20 A.5 Frequency response of the measurement system exclusive of the microphone . 21 A.6 Linear operating range of the measurement system exclusive of the microphone . 21 A.7 Spectrum analysis system . 21 Annex B (informative) Relationship between tolerance interval, correspond
39、ing acceptance interval and the maximum permitted uncertainty of measurement . 22 Bibliography 24 Figure 1 Illustration of sound incidence angles from the principal axis of the microphone . 15 Figure B.1 Relationship between tolerance interval, corresponding acceptance interval and the maximum permi
40、tted uncertainty of measurement . 22 Table 1 ICAO measurement protocols (informative) . 11 Table 2 Maximum difference between the free-field sensitivity level of a microphone used in grazing-incidence microphone configuration at normal incidence and at specified sound incidence angles 15 BS EN IEC 6
41、1265:2018 4 IEC 61265:2018 IEC 2018 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ ELECTROACOUSTICS INSTRUMENTS FOR MEASUREMENT OF AIRCRAFT NOISE PERFORMANCE REQUIREMENTS FOR SYSTEMS TO MEASURE SOUND PRESSURE LEVELS IN NOISE CERTIFICATION OF AIRCRAFT FOREWORD 1) The International Electrotechnical Commi
42、ssion (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and i
43、n addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)“). Their preparation is entrusted to technical committees; any IEC National Committee i
44、nterested in the subject dealt with may participate in this preparatory work. International, governmental and non-governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordanc
45、e with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interes
46、ted IEC National Committees. 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsibl
47、e for the way in which they are used or for any misinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence bet
48、ween any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity assessment services and, in some areas, access to IEC marks of c
49、onformity. IEC is not responsible for any services carried out by independent certification bodies. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal
