1、BRITISH STANDARD BS EN 61260:1996 IEC 61260:1995 Incovorating Amendment No. I Electroacoustics Octave-band and fractional-octave-band filters This European Standard EN 61260: 1995, with the incorporation of amendment A1:2001, has the status ofa British Standard ICs 17.140.50 British Standards NO COP
2、YING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN61260:1996 Amd.No. 13718 This British Standard, having been prepared under the direction of the Electrotechnical Sector Board, was published under the authority of the Standards Board and comes into effect on 15 July 1996 Date Com
3、ments 23 August 2002 See national foreword O BSI 23 August 2002 The following BSI references relate to the work on this standard: Committee reference EPL/29 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee EPL/29, Electroa
4、coustics, upon which the following bodies were represented: British Association of Otolaryngologists British Hearing Aid Industry Association British Medical Association British Society ofAudiology British Telecommunications plc Confederation of British Industry Department of Health Department of Tr
5、ade and Industry (National Physical Laboratory) Health and Safety Executive Institute of Acoust ics Institute of Sound and Vibration Research Institution of Electrical Engineers Medical Research Council Ministry of Defence Royal Aeronautical Society Royal National Institute for Deaf people Society o
6、f Environmental Engineers University of Exeter Amendments issued since publication Draft for comment 94/201753 DC ISBN O 580 25912 9 BS EN61260:1996 Contents Committees responsible National foreword Page Inside front cover 11 Foreword Text of EN 61260 2 3 i O BSI 23 August 2002 BS EN61260:1996 Natio
7、nal foreword This British Standard has been prepared by Technical Committee EPL/29 and is the English language version ofEN 61260: 1995, Electroacoustics- Octave-band and fractional-octave-bandJilters, including amendment Al :200 1, published by the European Committee for Electrotechnical Standardiz
8、ation (CENELEC). It is identical with IEC 61260, first edition 1995, including amendment 1, and supersedes BS 2475: 1964, SpeciJication for octave andone-thirdoctave band-pass Jilters, which is withdrawn. The start and finish of text introduced or altered by amendment is indicated by tags m a. Tags
9、indicating changes to IEC text carry the number of the amendment. For example, text altered by IEC amendment 1 is indicated bym a. From 1 January 1997, all IEC publications have the number 60000 added to the old number. For instance, IEC 27-1 has been renumbered as IEC 60027-1. For a period of time
10、during the change over fiom one numbering system to the other, publications may contain identifiers from both systems. Cross-refer en ces The British Standards which implement international or European publications referred to in this document may be found in the BSICatalogueunder the section entitl
11、ed “International Standards Correspondence Index”, or by using the “Search” facility of the BSIElectronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance w
12、ith a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a fiont cover, an inside fiont cover, pages i and ii, the EN title page, pages 2 to 28, an inside back cover and a back cover. The BSI copyright notice displayed in this documen
13、t indicates when the document was last issued. 11 O BSI 23 August 2002 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 61260 October 1995 +Al December 200 1 ICs 17.140.50 Descriptors: Electroacoustics, bandpass filters, octave band filter, definitions, performance evaluation, attenuation, frequ
14、ency responses, tests, technical notices, marking English version Electroacoustics - Octave-band and fractional-oct ave-band filters (includes amendment Al :200 1) (IEC 61260:1995 + A1:2001) Electroacoustique - Elektroakustik - Filtres de bande doctave et de bande dune fraction doctave (inclut lamen
15、dement Al :200 1) (CE1 61260:1995 +A1:2001) Bandfilter Fur Oktaven und Bruchteile von Oktaven (enthlt nderung Al :200 1) (IEC 61260:1995 + A1:2001) This European Standard was approved by CENELEC on 1995-09-20. Amendment Al was approved by CENELEC on 2001-12-01. CENELEC members are bound to comply wi
16、th the CENKENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-tedate lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretaria
17、t or to any CENELEC 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 CENELEC member into its own language and notified to the Central Secretariat has the same status as the of
18、ficial versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechn
19、ical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels O 1995 Copyright reserved to CENELEC members Ref No. EN 61260:1995 +A1:2001 E EN 61260:1995 Fore word The text ofdocument 29/
20、292/DIS, future edition 1 of IEC 1260, prepared by IEC TC 29, Electroacoustics, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 61260 on 1995-09-20. The following dates were fixed: Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 Definitions 4 4 Performa
21、nce requirements 8 5 Test methods 13 6 Instrument marking 17 7 Instruction manual 17 8 Electromagnetic and electrostatic compatibility requirements and test procedur es 18 Annex A (informative) Midband frequencies 23 AnnexB (infamative) Normalized frequencies at breakpoints of limits on minimum and
22、maximum relative attenuation for one-third-octave-band filters 25 Annex C (informative) Recommendations for verification of the electrical performance characteristics of bandpass filters 26 Annex D (informative) Radio-fkequency emission limits 27 Annex ZA (normative) Normative references to internat
23、ional publications with their corresponding European publications 28 Figure 1 - Illustration of minimum and maximum limits on relative attenuation for class 1 octave-band filters 11 Table 1 -Limits on relative attenuation fa octave-band filters 10 Table A. 1 - Midband frequencies for oct ave-band an
24、d one-thir d-oct ave-band filters in the audio range 24 Table B. 1 -Limits on relative attenuation for one-third-octave-band filters 26 - latest date by which the EN has to be implemented at national level by publication of an identical national standard or by - latest date by which the national sta
25、ndards conflicting with the EN have to be withdrawn endorsement (dq) 1996-07-01 (dow) 1996-07-01 Annexes designated “normative” are part of the body of the standard. Annexes designated “informative”are given for information only. In this standard, Annex ZA is normative and Annex A, Annex B and Annex
26、 C are informative. Annex ZA has been added by CENELEC. Foreword to amendment Al The text of document 29/496/FDIS, future amendment 1 to IEC 61260: 1995, prepared by IEC TC 29, Electroacoustics, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as amendment Al to EN 61260:19
27、95 on 2001-12-01. The following dates were fixed: - latest date by which the amendment has to be implemented at national level by publication of an identical national standard or by endorsement (dq) 2002-09-0 1 - latest date by which the national standards conflicting with the amendment have to be w
28、ithdrawn (dw) 2004-12-0 1 Annexes designated “normative” are part of the body of the standard. Annexes designated “informative”are given for information only. In this amendment, Annex ZA is normative and Annex C and Annex D are informative. Annex ZA has been added by CENELEC. 2 OBSI 23 August 2002 E
29、N61260:1995 1 Scope 1.1 This International Standard provides performance requirements and methods for testing the performance of analogue, sampled-data, and digital implementations of bandpass filters that comprise a filter set or spectrum analyser. The extent of the passband region of a filters rel
30、ative attenuation characteristic is a constant percentage of the midband frequency for all filters of a given bandwidth. An instrument complying with the requirements of this International Standard may contain any number of bandpass filters covering any desired frequency range. 1.2 Performance requi
31、rements are provided for three filter classes designated class O, class 1, and class 2. Allowed tolerances increase as the class number increases. 1.3 Bandpass filters complying with the performance requirements of this standard may be part of various measurement systems or may be an integral compon
32、ent of a specific instrument and shall operate in real time. Performance requirements apply to any method that is selected by the manufacturer to implement the design of the filters. 1.4 Instruments complying with the requirements of this standard are capable of providing frequency-band-filtered spe
33、ctral information for a wide variety of signals, for example, time-varying, intermittent, and steady; broadband and discrete frequency; and long and short durations. For applications involving transient signals, different realizations of filters meeting the requirements ofthis standard may give diff
34、erent results. 2 Normative references The foliowing normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All normative documents are subject to revision, and
35、parties to agreements based on this International Standard are encouraged to investigate the possibility ofapplying the most recent editions ofthe normative documents indicated below. Members of the IEC and IS0 maintain registers of currently valid Internat ional Stan dards. IEC 60050(80 1): 1994, I
36、nternational Electrotechnical Viabulary (IEV) - Chaptw 801: Acoustics and electroacoustics. IEC 6065 1 : 1979, Sound level meters. Amendment 1 : 1993 m Text deleted a IEC 60804: 1985, Integrating-averag.ngsound level meters. Amendment 1, 1989 Amendment 2, 1993 m IEC 6 1000-4-2: 1995, Electromagnetic
37、 compatibility (EMV -Part 4: Testing and measurement techniques - Section 2: Electrmtatic discharge immunity test - Basic EMCpublication. IEC 6 10004-3 : 1995, Electromagnetic compatibility (EMC) -Part 4: Testing and measurement techniques - Section 3: Radiated, radio-equency, electromagneticJield i
38、mmunity test. Amendment 1 (1998) IEC 6 1000-6-1 : 1997, Electromagnetic compatibility (EMC) -Part 6: Genericstandards - Section I: Immunity fw residential, cmmercial and light-industrial environments. IEC 6 1000-6-2: 1999, Electromagnetic compatibility (EMC) -Part 6: Generic standards - Section 2: I
39、mmunity fw industrial environments. a IS0 266: 1975, Acoustics - Prefewed frequencies fw measurements. OIML: 1978, Viabulary of legal metrology -Fundamental tem. m CISPWIEC 6 1000-6-3 : 1996, Electromagnetic compatibility (EMQ -Part 6: Generic standards - Section 3: Emission standard for residential
40、, commercial and light-industrial environments. 1) There exists a consolidated edition 1.2 (2001) that includes IEC 61000-4-3 (1998) and its amendment 1 (1998) and amendment 2 (2000). 3 O BSI 23 August 2002 EN 61260:1995 CISPR 16- 1: 1999, SpeczJication for radio disturbance and immunity measuring a
41、pparatus and methods - Part I: Radio disturbance and immunity measuring apparatus. CISPR 22: 1997, Information technology equipment -Radio disturbance characteristics -Limits and methods of measurement. a 3 Definitions For the purpose of this International Standard, the definitions contained in IEC
42、61000-4-2, IEC 61000-4-3, IEC 61000-6-1, IEC 61000-6-2 and CISPR 61000-6-3 as well as the following definitions apply. NOTE of legal metrology. For definitions of additional terms in this standard, reference should be made to IEC 60050(801) and the OIMLVocabulary 3.1 bandpass filter filter with a si
43、ngle transmission band (or passband with small relative attenuation) extending from a lower bandedge frequency greater than zero to a finite upper bandedge frequency 3.2 octave ratio nominal frequency ratio of 2: 1; general symbol G NOTE 1 fractional-octave-band, frequency ratio. NOTE 2 NOTE 3 For b
44、ase-ten systems, = 2 NOTE 4 This standard permits two options, designated base-ten and base-two, for determining an octave-band, or For base-ten systems, GI, = 103“0 The base-ten system is preferred. 3.3 bandwidth designator reciprocal of a positive integer, including 1, to designate the fraction of
45、 an octave band; symbol llb 3.4 reference frequency frequency of 1 O00 Hz, exactly; symbolf, 3.5 exact midband frequency in hertz, a frequency that has a specified relationship to the reference frequency such that the ratio of the exact midband frequencies of any two contiguous bandpass filters is t
46、he same for all filters in a filter set of a specified bandwidth; symbol fm. When the denominator of the bandwidth designator is an odd number, exact midband frequencies of any filter in a set of filters are determined from: and when the denominator of the bandwidth designator is an even number, exa
47、ct midband frequencies of any filter in a set of filters are determined from: where x is any integer, positive, negative, or zero NOTE 1 Exact midband frequencies determined from equation (3) or (4) permit the output of narrow-fractional-octave-band filters to be combined to yield the band level of
48、a filter ofwider-bandwidth with a corresponding exact midband frequency and corresponding bandedge frequencies. NOTE 2 other 10: 1 frequency range except for the position of the decimal sign. With the base-two system, midband frequencies are unique and do not repeat. NOTE 3 frequency of 5 O00 Hz is
49、5 O1 1,872 Hz to three decimal places by the base-ten system and 5 039,684 Hz by the base-two system, or a difference of approximately 0,6 %. At a nominal midband frequency of 50 O00 Hz, the exact midband frequency is 50 118,723 Hz by the base-ten system and 50 796,834 Hz by the base-two system, or an approximate difference of 1,4 %O. With the base-ten system, midband frequencies included within any 10: 1 frequency range are the same as within any As examples, for one-third-octave-band filters, the exact midband frequency for the band with a nominal midband 4 OBSI 23 August 2002
