1、 ANSI/ASA S1.4-2014/Part 1 / IEC 61672-1:2013 AMERICAN NATIONAL STANDARD Electroacoustics Sound Level Meters Part 1: Specifications (a nationally adopted international standard) Accredited Standards Committee S1, Acoustics Standards Secretariat Acoustical Society of America 1305 Walt Whitman Road, S
2、uite 300 Melville, NY 11747 ANSI/ASA S1.4-2014/Part 1 /IEC 61672-1:2013The American National Standards Institute, Inc. (ANSI) is the national coordinator of voluntary standards development and the clearinghouse in the U.S.A. for information on national and international standards. The Acoustical Soc
3、iety of America (ASA) is an organization of scientists and engineers formed in 1929 to increase and diffuse the knowledge of acoustics and to promote its practical applications. ANSI/ASA S1.4-2014/Part 1 / IEC 61672-1:2013 (Revision of ANSI S1.4-1983 R2006, ANSI S1.4a-1985 R2006, and ANSI S1.43-1997
4、 R2007) AMERICAN NATIONAL STANDARD Electroacoustics Sound Level Meters Part 1: Specifications (a nationally adopted international standard) Secretariat: Acoustical Society of America Approved on July 21, 2014 by: American National Standards Institute, Inc. Abstract This part of ANSI/ASA S1.4 / IEC 6
5、1672 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 meter that measures time-averaged, frequency-weigh
6、ted sound levels; and an integrating sound level meter that measures frequency-weighted sound exposure levels. AMERICAN NATIONAL STANDARDS ON ACOUSTICS The Acoustical Society of America (ASA) provides the Secretariat for Accredited Standards Committees S1 on Acoustics, S2 on Mechanical Vibration and
7、 Shock, S3 on Bioacoustics, S3/SC 1 on Animal Bioacoustics, and S12 on Noise. These committees have wide representation from the technical community (manufacturers, consumers, trade associations, organizations with a general interest, and government representatives). The standards are published by t
8、he Acoustical Society of America as American National Standards after approval by their respective Standards Committees and the American National Standards Institute (ANSI). These standards are developed and published as a public service to provide standards useful to the public, industry, and consu
9、mers, and to Federal, State, and local governments. Each of the Accredited Standards Committees (operating in accordance with procedures approved by ANSI) is responsible for developing, voting upon, and maintaining or revising its own Standards. The ASA Standards Secretariat administers Committee or
10、ganization and activity and provides liaison between the Accredited Standards Committees and ANSI. After the Standards have been produced and adopted by the Accredited Standards Committees, and approved as American National Standards by ANSI, the ASA Standards Secretariat arranges for their publicat
11、ion and distribution. An American National Standard implies a consensus of those substantially concerned with its scope and provisions. Consensus is established when, in the judgment of the ANSI Board of Standards Review, substantial agreement has been reached by directly and materially affected int
12、erests. Substantial agreement means much more than a simple majority, but not necessarily unanimity. Consensus requires that all views and objections be considered and that a concerted effort be made towards their resolution. The use of an American National Standard is completely voluntary. Their ex
13、istence does not in any respect preclude anyone, whether he or she has approved the Standards or not, from manufacturing, marketing, purchasing, or using products, processes, or procedures not conforming to the Standards. NOTICE: This American National Standard may be revised or withdrawn at any tim
14、e. The procedures of the American National Standards Institute require that action be taken periodically to reaffirm, revise, or withdraw this Standard. Acoustical Society of America ASA Secretariat 1305 Walt Whitman Road, Suite 300 Melville, New York 11747 Telephone: 1 (631) 390-0215 Fax: 1 (631) 9
15、23-2875 E-mail: asastdsacousticalsociety.org 2014 by Acoustical Society of America. This standard may not be reproduced in whole or in part in any form for sale, promotion, or any commercial purpose, or any purpose not falling within the provisions of the U.S. Copyright Act of 1976, without prior wr
16、itten permission of the publisher. For permission, address a request to the Standards Secretariat of the Acoustical Society of America. These materials are subject to copyright claims of IEC and ASA. No part of this publication may be reproduced in any form, including an electronic retrieval system,
17、 without the prior written permission of the Acoustical Society of America (ASA). All requests pertaining to this standard should be submitted to the ASA. 2014 Acoustical Society of AmericaAll rights reserved i Contents 1 Scope . 1 2 Normative references . 2 3 Terms and definitions . 2 4 Reference e
18、nvironmental conditions 9 5 Performance specifications 9 5.1 General . 9 5.2 Adjustments at the calibration check frequency . 12 5.3 Corrections to indicated levels 13 5.4 Directional response . 15 5.5 Frequency weightings . 16 5.6 Level linearity 18 5.7 Self-generated noise . 19 5.8 Time-weightings
19、 F and S 19 5.9 Toneburst response 20 5.10 Response to repeated tonebursts . 20 5.11 Overload indication . 22 5.12 Under-range indication 23 5.13 C-weighted peak sound level 23 5.14 Stability during continuous operation 24 5.15 High-level stability . 24 5.16 Reset . 25 5.17 Thresholds 25 5.18 Displa
20、y 25 5.19 Analogue or digital output . 25 5.20 Timing facilities 26 5.21 Radio frequency emissions and disturbances to a public power supply 26 5.22 Crosstalk . 27 5.23 Power supply . 27 6 Environmental, electrostatic, and radio-frequency requirements 28 6.1 General . 28 6.2 Static pressure 28 6.3 A
21、ir temperature . 29 6.4 Humidity 29 6.5 Electrostatic discharge 29 6.6 A.C. power-frequency and radio-frequency fields . 29 6.7 Mechanical vibration . 31 7 Provision for use with auxiliary devices . 31 8 Marking 32 ii 2014 Acoustical Society of AmericaAll rights reserved 9 Instruction Manual 32 9.1
22、General . 32 9.2 Information for operation . 32 9.3 Information for testing . 36 Annex A (informative) Relationship between tolerance interval, corresponding acceptance interval and the maximum-permitted uncertainty of measurement . 39 Annex B (normative) Maximum-permitted uncertainties of measureme
23、nt . 40 Annex C (informative) Example assessments of conformance to specifications of this standard . 42 Annex D (normative) Frequencies at fractional-octave intervals . 45 Annex E (normative) Analytical expressions for frequency-weightings C, A, and Z 47 Annex F (informative) Additional information
24、 for U.S. users regarding low-frequency tolerances in this standard vs. previous versions of ANSI S1.4 . 49 Tables Table 1 Acceptance limits for the difference between a measured windscreen correction and the corresponding correction given in the Instruction Manual . 14 Table 2 Acceptance limits for
25、 deviations of directional response from the design goal 16 Table 3 Frequency weightings and acceptance limits . 17 Table 4 Reference 4 kHz toneburst responses and acceptance limits 21 Table 5 Reference differences for C-weighted peak sound levels and acceptance limits 24 Table 6 Limits for conducte
26、d disturbance to the voltage of a public supply of electric power . 27 Table B.1 Maximum-permitted uncertainties of measurement for a coverage probability of 95 % . 40 Table C.1 Examples of assessment of conformance 43 Table D.1 Frequencies at one-third-octave intervals . 45 Table D.2 Frequencies at
27、 one-sixth-octave intervals . 46 Table D.3 Frequencies at one-twelfth-octave intervals 46 Table F.1 Frequency response tolerance limits in ANSI S1.4-1983 50 Figures Figure 1 Principal steps involved in forming a time-weighted sound level 4 2014 Acoustical Society of AmericaAll rights reserved iii Fi
28、gure A.1 Relationship between tolerance interval, corresponding acceptance interval and the maximum-permitted uncertainty of measurement . 39 Figure C.1 Examples of assessment of conformance . 44 iv 2014 Acoustical Society of AmericaAll rights reserved Foreword This Foreword is for information only
29、and is not a part of the American National Standard ANSI/ASA S1.4-2014/Part 1 / IEC 61672-1:2013 American National Standard Electroacoustics Sound level meters Part 1: Specifications. As such, this Foreword may contain material that has not been subjected to public review or a consensus process. In
30、addition, it does not contain requirements necessary for conformance to the standard. This standard comprises a part of a group of definitions, standards, and specifications for use in acoustics. It was developed and approved by Accredited Standards Committee S1 Acoustics, under its approved operati
31、ng procedures. Those procedures have been accredited by the American National Standards Institute (ANSI). The Scope of Accredited Standards Committee S1 is as follows: Standards, specifications, methods of measurement and test, and terminology in the field of physical acoustics, including architectu
32、ral acoustics, electroacoustics, sonics and ultrasonics, and underwater sound, but excluding those aspects which pertain to biological safety, tolerances, and comfort. This nationally adopted international standard is a revision of ANSI S1.4-1983 (R 2006), ANSI S1.4A-1985 (R 2006), and ANSI S1.43-19
33、97 (R 2007), which have been technically revised. This standard is identical to IEC 61672-1:2013, which was prepared by IEC Technical Committee 29, in cooperation with the International Organization of Legal Metrology (OIML). However, in conformance with ANSI and IEC rules, the words “this part of A
34、NSI/ASA S1.4 / IEC 61672” replace the words “this part of IEC 61672” where they appear in the IEC document, decimal points were substituted in place of the decimal commas used in IEC documents, and American English spelling is used in place of British English spelling. An informational annex is also
35、 included that is not found in IEC 61672/Part 1. In accordance with clause A.1 b) of ANSI Procedures for the National Adoption of ISO and IEC Standards as American National Standards, a standard will still be considered identical if it includes “any regional or national informative material (e.g. in
36、formative annexes that do not alter, add to or delete from the provision of the ISO or IEC standard); examples of informative material are advice to users, training guidance or suggested forms or reports.” This standard includes six Annexes. Annexes B, D and E are normative and are considered to be
37、a part of this standard. Annexes A and C are informative and are not considered part of this standard. Annex F is additional, totally informative material for U.S. users and is shown in bold, blue text within a blue border. The ANSI/ASA equivalents for the IEC standards in the IEC 61672 series are g
38、iven below: ANSI/ASA S1.4-2014/Part 1 / IEC 61672-1:2013 is an identical national adoption of IEC 61672-1:2013. ANSI/ASA S1.4-2014/Part 2 / IEC 61672-2:2013 is an identical national adoption of IEC 61672-2:2013. ANSI/ASA S1.4-2014/Part 3 / IEC 61672-3:2013 is an identical national adoption of IEC 61
39、672-3:2013. 2014 Acoustical Society of AmericaAll rights reserved v At the time this Standard was submitted to Accredited Standards Committee S1, Acoustics for approval, the membership was as follows: R.J. Peppin, Chair A. Scharine, Vice-Chair S.B. Blaeser, Secretary 3M Personal Safety Division, Det
40、ection Solutions . P.J. Battenberg M. Wurm (Alt.) Acoustical Society of America . R.J. Peppin Air-Conditioning, Heating and Refrigeration Institute S.J. Lind D. Abbate (Alt.) American Industrial Hygiene Association D. Driscoll D. Sandfort (Alt.) Campanella Associates A.J. Campanella Casella USA R. B
41、rauch ETS-Lindgren Acoustic Systems D. Winker M. Black (Alt.) G.R.A.S. Sound FAX: 631-923-2875; E-mail: asastdsacousticalsociety.org. 2014 Acoustical Society of AmericaAll rights reserved vii Introduction U.S. NOTE: The following introductory text describes the differences between the current versio
42、n of IEC 61672-1 and the 2002 version; it does NOT present the differences between this version and the previous version of ANSI S1.4-1983, ANSI S1.4A-1985, or ANSI S1.43-1997. For assessments of conformance to performance specifications, this second edition of IEC 61672-1 uses different criteria th
43、an 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 or
44、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 deviati
45、on 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 assess
46、ments 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, ext
47、ended 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 allo
48、wances 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 probabilit
49、y 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 the 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
