EN 61672-1-2013 en Electroacoustics - Sound level meters - Part 1 Specifications.pdf

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1、BSI Standards PublicationElectroacoustics Sound level metersPart 1: SpecificationsBS EN 61672-1:2013National forewordThis British Standard is the UK implementation of EN 61672-1:2013. It isidentical to IEC 61672-1:2013. It supersedes BS EN 61672-1:2003 which iswithdrawn.The UK participation in its p

2、reparation was entrusted to TechnicalCommittee EPL/29, Electroacoustics.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisions ofa contract. Users are responsible for its correct appli

3、cation. The British Standards Institution 2013Published by BSI Standards Limited 2013ISBN 978 0 580 68846 1ICS 17.140.50Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committe

4、e on 31 December 2013.Amendments issued since publicationDate Text affectedBRITISH STANDARDBS EN 61672-1:2013EUROPEAN STANDARD EN 61672-1 NORME EUROPENNE EUROPISCHE NORM December 2013 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Euro

5、pisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marnix 17, B - 1000 Brussels 2013 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 61672-1:2013 E ICS 17.140.50 Supersedes EN 61672-1:2003 English v

6、ersion Electroacoustics - Sound level meters - Part 1: Specifications (IEC 61672-1:2013) Electroacoustique - Sonomtres - Partie 1: Spcifications (CEI 61672-1:2013) Elektroakustik - Schallpegelmesser - Teil 1: Anforderungen (IEC 61672-1:2013) This European Standard was approved by CENELEC on 2013-11-

7、04. 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 lists and bibliographical references concerning such national standards may be obtai

8、ned 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 translation under the responsibility of a CENELEC member into its own language and notified to

9、 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, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece,

10、 Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. EN 61672-1:2013 - 2 - Foreword The text of document 29/812/FDIS, future edition 2 of IEC 61672-1

11、, prepared by IEC/TC 29 “Electroacoustics“ in cooperation with the International Organization of Legal Metrology (OIML), was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 61672-1:2013. The following dates are fixed: latest date by which the document has to be implemented a

12、t national level by publication of an identical national standard or by endorsement (dop) 2013-08-04 latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2016-11-04 This document supersedes EN 61672-1:2003. EN 61672-1:2013 includes the following signif

13、icant technical changes with respect to EN 61672-1:2003. In this second edition, conformance to specifications is demonstrated when a) measured deviations from design goals do not exceed the applicable acceptance limits, and b) the uncertainty of measurement does not exceed the corresponding maximum

14、-permitted uncertainty, with both uncertainties determined for a coverage probability of 95 %. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC and/or CEN shall not be held responsible for identifying any or all such patent

15、 rights. Endorsement notice The text of the International Standard IEC 61672-1:2013 was approved by CENELEC as a European Standard without any modification. BS EN 61672-1:2013- 3 - EN 61672-1:2013 Annex ZA (normative) Normative references to international publications with their corresponding Europe

16、an 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 latest edition of the referenced document (including any amendments)

17、applies. NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year IEC 60942 - Electroacoustics - Sound calibrators EN 60942 - IEC 61000-4-2 2008 Electromagnetic compatibility (EMC) Part 4-2: Te

18、sting and measurement techniques - Electrostatic discharge immunity test EN 61000-4-2 2009 IEC 61000-6-2 2005 Electromagnetic compatibility (EMC) Part 6-2: Generic standards - Immunity for industrial environments EN 61000-6-2 + corr. September 2005 2005 IEC 61094-6 - Measurement microphones Part 6:

19、Electrostatic actuators for determination of frequency response EN 61094-6 - IEC 61183 - Electroacoustics - Random-incidence and diffuse-field calibration of sound level meters EN 61183 - IEC 62585 - Electroacoustics - Methods to determine corrections to obtain the free-field response of a sound lev

20、el meter EN 62585 - ISO/IEC Guide 98-4 2012 Uncertainty of measurement Part 4: Role of measurement uncertainty in conformity assessment - - ISO/IEC Guide 99 International vocabulary of metrology - Basic and general concepts and associated terms (VIM) - - CISPR 16-1-1 + corr. October + corr. October

21、+ A1 2010 2010 2011 2010 Specification for radio disturbance and immunity measuring apparatus and methods Part 1-1: Radio disturbance and immunity measuring apparatus - Measuring apparatus EN 55016-1-1 - - + A1 2010 - - 2010 BS EN 61672-1:2013 2 61672-1 IEC:2013 CONTENTS INTRODUCTION . 6 1 Scope . 7

22、 2 Normative references . 8 3 Terms and definitions . 8 4 Reference environmental conditions . 14 5 Performance specifications . 14 5.1 General . 14 5.2 Adjustments at the calibration check frequency . 17 5.3 Corrections to indicated levels . 17 5.3.1 General . 17 5.3.2 Reflections and diffraction .

23、 17 5.3.3 Windscreens 18 5.3.4 Format for correction data . 18 5.3.5 Corrections for use during periodic testing . 19 5.4 Directional response 19 5.5 Frequency weightings 20 5.6 Level linearity 23 5.7 Self-generated noise . 24 5.8 Time-weightings F and S . 24 5.9 Toneburst response . 24 5.10 Respons

24、e to repeated tonebursts 26 5.11 Overload indication . 27 5.12 Under-range indication 27 5.13 C-weighted peak sound level . 27 5.14 Stability during continuous operation . 28 5.15 High-level stability . 28 5.16 Reset 29 5.17 Thresholds 29 5.18 Display 29 5.19 Analogue or digital output 29 5.20 Timin

25、g facilities . 30 5.21 Radio frequency emissions and disturbances to a public power supply 30 5.22 Crosstalk . 31 5.23 Power supply . 31 6 Environmental, electrostatic, and radio-frequency requirements . 32 6.1 General . 32 6.2 Static pressure 32 6.3 Air temperature . 32 6.4 Humidity 33 6.5 Electros

26、tatic discharge 33 6.6 A.C. power-frequency and radio-frequency fields . 33 6.7 Mechanical vibration 34 7 Provision for use with auxiliary devices 35 8 Marking 35 9 Instruction Manual 35 BS EN 61672-1:201361672-1 IEC:2013 3 9.1 General . 35 9.2 Information for operation . 36 9.2.1 General . 36 9.2.2

27、 Design features . 36 9.2.3 Power supply . 37 9.2.4 Adjustments at the calibration check frequency . 37 9.2.5 Corrections to indicated levels . 37 9.2.6 Operating the sound level meter 37 9.2.7 Accessories . 38 9.2.8 Influence of variations in environmental conditions 38 9.3 Information for testing

28、. 39 Annex A (informative) Relationship between tolerance interval, corresponding acceptance interval and the maximum-permitted uncertainty of measurement 41 Annex B (normative) Maximum-permitted uncertainties of measurement 42 Annex C (informative) Example assessments of conformance to specificatio

29、ns of this standard . 44 Annex D (normative) Frequencies at fractional-octave intervals . 47 Annex E (normative) Analytical expressions for frequency-weightings C, A, and Z . 49 Figure 1 Principal steps involved in forming a time-weighted sound level . 10 Figure A.1 Relationship between tolerance in

30、terval, corresponding acceptance interval and the maximum-permitted uncertainty of measurement . 41 Figure C.1 Examples of assessment of conformance . 46 Table 1 Acceptance limits for the difference between a measured windscreen correction and the corresponding correction given in the Instruction Ma

31、nual . 18 Table 2 Acceptance limits for deviations of directional response from the design goal . 20 Table 3 Frequency weightings and acceptance limits . 22 Table 4 Reference 4 kHz toneburst responses and acceptance limits 25 Table 5 Reference differences for C-weighted peak sound levels and accepta

32、nce limits . 28 Table 6 Limits for conducted disturbance to the voltage of a public supply of electric power . 31 Table B.1 Maximum-permitted uncertainties of measurement for a coverage probability of 95 % 42 Table C.1 Examples of assessment of conformance 45 Table D.1 Frequencies at one-third-octav

33、e intervals 47 Table D.2 Frequencies at one-sixth-octave intervals 48 Table D.3 Frequencies at one-twelfth-octave intervals . 48 BS EN 61672-1:2013 6 61672-1 IEC:2013 INTRODUCTION For assessments of conformance to performance specifications, this second edition of IEC 61672-1 uses different criteria

34、 than were used for the 2002 first edition. In the period from 1961 to 1985, International Standards for sound level meters did not provide any requirements or recommendations to account for the uncertainty of measurement in assessments of conformance to specifications. This absence of requirements

35、or recommendations to account for uncertainty of measurement created ambiguity in determinations of conformance to specifications for situations where a measured deviation from a design goal was close to a limit of the allowed deviation. If conformance was determined based on whether a measured devi

36、ation did or did not exceed the limits, the end-user of the sound level meter 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 ass

37、essments of conformance in International Standards that it prepares. The first edition (2002) of IEC 61672-1 accounted for measurement uncertainty by giving two explicit criteria for determining conformance to the specifications. The two criteria were (a) that measured deviations from design goals,

38、extended by the expanded uncertainty of measurement, do not exceed the applicable tolerance limits and (b) that the expanded uncertainty of measurement does not exceed agreed-upon maximum values. For most performance specifications, the tolerance limits were calculated essentially by extending the a

39、llowances for design and manufacturing from the 1979 and 1985 International Standards for sound level meters by the applicable maximum-permitted expanded uncertainties of measurement. Tolerance limits were intended to represent the limits for true deviations from design goals with a coverage probabi

40、lity of 95 %. This second edition of IEC 61672-1 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 measurement does not exceed th

41、e corresponding maximum-permitted uncertainty. Acceptance limits are analogous to the allowances for design and manufacturing implied in the first edition (2002) of IEC 61672-1. Actual and maximum-permitted uncertainties are determined for a coverage probability of 95 %. The amended criterion for as

42、sessing conformance does not necessitate any change to the design of a sound level meter in order to conform to the specifications of this International Standard. The maximum-permitted uncertainties of measurement are not equivalent to the uncertainties associated with the measurement of a sound lev

43、el. The uncertainty of a measured sound level is evaluated from the anticipated deviations of the electroacoustical performance of the sound level meter from the relevant design goals as well as estimates of the uncertainties associated with the specific measurement situation. Unless more-specific i

44、nformation is available, the evaluation of the contribution of a specific sound level meter to a total measurement uncertainty can be based on the acceptance limits and maximum-permitted uncertainties specified in this standard. BS EN 61672-1:201361672-1 IEC:2013 7 ELECTROACOUSTICS SOUND LEVEL METER

45、S Part 1: Specifications 1 Scope This part of IEC 61672 gives electroacoustical performance specifications for three kinds of sound measuring instruments: a time-weighting sound level meter that measures exponential-time-weighted, frequency-weighted sound levels; an integrating-averaging sound level

46、 meter that measures time-averaged, frequency-weighted sound levels; and an integrating sound level meter that measures frequency-weighted sound exposure levels. Sound level meters conforming to the requirements of this standard have a specified frequency response for sound incident on the microphon

47、e from one principal direction in an acoustic free field or successively from random directions. Sound level meters specified in this standard are intended to measure sounds generally in the range of human hearing. NOTE The AU frequency weighting specified in IEC 61012 can be applied for measurement

48、s of A-weighted sound levels of audible sound in the presence of a source that contains spectral components at frequencies greater than 20 kHz.1Two performance categories, class 1 and class 2, are specified in this standard. In general, specifications for class 1 and class 2 sound level meters have

49、the same design goals and differ mainly in the acceptance limits and the range of operational temperature. Acceptance limits for class 2 are greater than, or equal to, those for class 1. This standard is applicable to a range of designs for sound level meters. A sound level meter may be a self-contained hand-held instrument with an attached microphone and a built-in display device. A sound level meter may be comprised of separate components in one or more enclosures and may be capable of displaying a vari