1、Electroacoustics Octave-band and fractional-octave-band filtersPart 3: Periodic testsBS EN 61260-3:2016BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06National forewordThis British Standard is the UK implementation of EN 61260-3:2016. It isidentical to IEC 61260-3:20
2、16. Together with BS EN 61260-1:2014 and BS EN 61260-2:2016, it supersedes BS EN 61260:1996 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee EPL/29, Electroacoustics.A list of organizations represented on this committee can be obtained onrequest to its s
3、ecretary.This publication does not purport to include all the necessary provisions ofa contract. Users are responsible for its correct application. The British Standards Institution 2016.Published by BSI Standards Limited 2016ISBN 978 0 580 85254 1ICS 17.140.50Compliance with a British Standard cann
4、ot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 30 June 2016. Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 61260-3:2016EUROPEAN STANDARD NORME EUROPENNE EUROPISC
5、HE NORM EN 61260-3 June 2016 ICS 17.140.50 Supersedes EN 61260:1995 (partially) English Version Electroacoustics - Octave-band and fractional-octave-band filters - Part 3: Periodic tests (IEC 61260-3:2016) Electroacoustique - Filtres de bande doctave et de bande dune fraction doctave - Partie 3: Ess
6、ais priodiques (IEC 61260-3:2016) Elektroakustik - Bandfilter fr Oktaven und Bruchteile von Oktaven - Teil 3: Periodische Einzelprfung (IEC 61260-3:2016) This European Standard was approved by CENELEC on 2016-04-27. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which
7、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 CENELEC member. This E
8、uropean Standard exists in three official 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
9、 members are the national electrotechnical 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
10、, Norway, Poland, Portugal, Romania, 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:
11、Avenue Marnix 17, B-1000 Brussels 2016 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members. Ref. No. EN 61260-3:2016 E BS EN 61260-3:2016EN 61260-3:2016 2 European foreword The text of document 29/846/CDV, future edition 1 of IEC 61260-3, prepared b
12、y IEC TC 29, Electroacoustics, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 61260-3:2016. 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 (d
13、op) 2017-01-27 latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2019-04-27 This document supersedes EN 61260:1995. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC and/or
14、CEN shall not be held responsible for identifying any or all such patent rights. Endorsement notice The text of the International Standard IEC 61260-3:2016 was approved by CENELEC as a European Standard without any modification. BS EN 61260-3:2016EN 61260-3:2016 3 Annex ZA (normative) Normative refe
15、rences to international publications with their corresponding European publications The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the l
16、atest edition of the referenced document (including any amendments) applies. NOTE 1 When an International 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 th
17、is annex is available here: www.cenelec.eu. Publication Year Title EN/HD Year IEC 61260-1 2014 Electroacoustics - Octave-band and fractional-octave-band filters - Part 1: Specifications EN 61260-1 2014 IEC 61260-2 2016 Electroacoustics - Octave-band and fractional-octave-band filters - Part 2: Patte
18、rn-evaluation tests EN 61260-2 2016 IEC 61672-1 - Electroacoustics - Sound level meters - Part 1: Specifications EN 61672-1 - ISO/IEC Guide 98-3 - Uncertainty of measurement - Part 3: Guide to the expression of uncertainty in measurement (GUM:1995) - - ISO/IEC Guide 98-4 - Uncertainty of measurement
19、 - Part 4: Role of measurement uncertainty in conformity assessment - - BS EN 61260-3:2016 2 IEC 61260-3:2016 IEC 2016 CONTENTS FOREWORD . 3 INTRODUCTION . 5 1 Scope 6 2 Normative references. 6 3 Terms and definitions 7 4 Submission for testing . 7 5 Conformance . 7 6 Preliminary inspection 8 7 Powe
20、r supply . 8 8 Environmental conditions . 8 9 Mandatory facilities and general requirements 8 9.1 General . 8 9.2 Test instruments . 10 10 Test of relative attenuation at midband frequency or effective bandwidth deviation 10 10.1 General . 10 10.2 Tests of relative attenuation at midband frequency .
21、 10 10.3 Test of effective bandwidth deviation . 10 11 Linear operating range, measurement range, level range control and overload indicator 11 12 Test of lower limit of linear operating range 12 13 Measurement of relative attenuation . 12 14 Documentation 13 Annex A (informative) Uncertainty relate
22、d to test by sinusoidal sweeps . 16 General . 16 A.1Digitally generated signal 16 A.2Test signal from a signal generator 17 A.3Comparing measurements . 18 A.4Annex B (informative) Test of effective bandwidth deviation with the use of an exponential sweep Example . 19 General . 19 B.1Example 19 B.2An
23、nex C (informative) Normalized frequencies for test of one-third-octave-band filters 21 General . 21 C.1Example calculation 21 C.2Bibliography . 23 Table 1 Frequency parameter R and acceptance limits on relative attenuation for fractional-octave-band filters . 13 Table C.1 Normalized test frequencie
24、s and acceptance limits on relative attenuation for one-third-octave-band filters 22 BS EN 61260-3:2016IEC 61260-3:2016 IEC 2016 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ ELECTROACOUSTICS OCTAVE-BAND AND FRACTIONAL-OCTAVE-BAND FILTERS Part 3: Periodic tests FOREWORD 1) The International Electrot
25、echnical Commission (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
26、this end and in 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 Nation
27、al Committee interested 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
28、) in accordance 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 fr
29、om all interested 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 h
30、eld responsible 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
31、divergence between 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
32、IEC marks of conformity. 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
33、 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 fees) and expenses arising out of the publication, use of, or reliance upon, this
34、IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this
35、IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 61260-3 has been prepared by IEC technical committee 29: Electroacoustics. This first edition of IEC 61260-3 (together with IEC 61260-1:201
36、4 and IEC 61260-2:2016), cancels and replaces the first edition of IEC 61260 published in 1995 and its Amendment 1 published in 2001. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to IEC 61260. a) The single document in
37、the first edition of IEC 61260:1995 is now separated into three parts of IEC 61260 covering: specifications, pattern evaluation tests and periodic tests; b) IEC 61260:1995 specified three performance categories: class 0, 1 and 2 while the IEC 61260 series specifies requirements for class 1 and 2; c)
38、 In IEC 61260:1995, the design goals for the specification can be based on base-2 or base-10 design. In the IEC 61260 series only base-10 is specified; BS EN 61260-3:2016 4 IEC 61260-3:2016 IEC 2016 d) The reference environmental conditions have been changed from 20 C/65 % RH to 23 C/50 % RH; e) IEC
39、 61260:1995 specified tolerance limits without considering the uncertainty of measurement for verification of the specifications while the IEC 61260 series specifies acceptance limits for the observed values and maximum-permitted uncertainty of measurements for laboratories testing conformance to sp
40、ecifications in the standard. The text of this standard is based on the following documents: CDV Report on voting 29/846/CDV 29/882A/RVC Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publication has been draft
41、ed in accordance with the ISO/IEC Directives, Part 2. A list of all the parts of the IEC 61260 series, published under the general title Electroacoustics Octave-band and fractional-octave-band filters can be found on the IEC website. The committee has decided that the contents of this publication wi
42、ll remain unchanged until the stability date indicated on the IEC website under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. BS EN 61260-3:2016IEC 61260-3:2016 IEC 201
43、6 5 INTRODUCTION IEC 61260:1995 and IEC 61260:1995/AMD 1:2001 are now separated into the following three parts of IEC 61260 series: Part 1: Specifications Part 2: Pattern evaluation tests Part 3: Periodic tests For assessments of conformance to performance specifications, IEC 61260-1 uses different
44、criteria than were used for the IEC 61260:1995 edition. IEC 61260:1995 did not provide any requirements or recommendations to account for the uncertainty of measurement in assessments of conformance to specifications. This absence of requirements or recommendations to account for uncertainty of meas
45、urement created ambiguity in determinations of conformance to specifications for situations where a measured deviation from a design goal was close to the limit of the allowed deviation. If conformance was determined based on whether a measured deviation did or did not exceed the limits, the end-use
46、r of the octave-band and fractional-octave-band filters incurred the risk that the true deviation from a design goal exceeded the limits. To remove this ambiguity, IEC Technical Committee 29, at its meeting in 1996, adopted a policy to account for measurement uncertainty in assessments of conformanc
47、e in International Standards that it prepares. This edition of IEC 61260-3 uses an amended criterion for assessing conformance to a specification. Conformance is demonstrated when (a) measured deviations from design goals do not exceed the applicable acceptance limits and (b) the uncertainty of meas
48、urement does not exceed the corresponding maximum-permitted uncertainty. Acceptance limits are analogous to the tolerance limits allowances for design and manufacturing implied in the IEC 61260:1995. Actual and maximum-permitted uncertainties of measurement are determined for a coverage probability
49、of 95 %. Unless more specific information is available, the evaluation of the contribution of a specific filter or filter set to a total measurement uncertainty can be based on the acceptance limits and maximum-permitted uncertainties specified in this standard. BS EN 61260-3:2016 6 IEC 61260-3:2016 IEC 2016 ELECTROACOUSTICS OCTAVE-BAND AND FRACTIONAL-OCTAVE-BAND FILTERS Part 3: Periodic tests 1 Scope 1.1 This part of IEC 61260 describes procedures for periodic testing of octa
