1、 ANSI/ASA S1.4-2014/Part 2 / IEC 61672-2:2013 AMERICAN NATIONAL STANDARD Electroacoustics Sound Level Meters Part 2: Pattern Evaluation Tests (a nationally adopted international standard) Accredited Standards Committee S1, Acoustics Standards Secretariat Acoustical Society of America 1305 Walt Whitm
2、an Road, Suite 300 Melville, NY 11747 ANSI/ASA S1.4-2014/Part 2 /IEC 61672-2:2013The 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 Acou
3、stical Society 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 2 / IEC 61672-2:2013 Electroacoustics Sound Level Meters Part 2: Pattern Evaluation Test
4、s (a nationally adopted international standard) Secretariat: Acoustical Society of America Approved on July 21, 2014 by: American National Standards Institute, Inc. Abstract ANSI/ASA S1.4-2014/Part 2 / IEC 61672-2:2013 provides details of the tests necessary to verify conformance to all mandatory sp
5、ecifications given in ANSI/ASA S1.4-2014/Part 1 / IEC 61672-1:2013 for time-weighting sound level meters, integrating-averaging sound level meters, and integrating sound level meters. Pattern-evaluation tests apply for each channel of a multi-channel sound level meter, as necessary. Tests and test m
6、ethods are applicable to class 1 and class 2 sound level meters. The aim is to ensure that all laboratories use consistent methods to perform pattern-evaluation tests. This edition constitutes a technical revision; the main technical changes with regard to the previous edition concern conformance to
7、 specifications which is now demonstrated when measured deviations from design goals do not exceed the applicable acceptance limits, and when the uncertainty of measurement does not exceed the corresponding maximum permitted uncertainty, with both uncertainties determined for a coverage probability
8、of 95 %. In this document, references to IEC 61672-1, IEC 61672-2, and IEC 61672-3 refer to the second editions of the IEC standards unless stated otherwise. They refer equally to the ANSI/ASA S1.4-2014 / IEC 61672:2013 editions. Procedures for the pattern-evaluation testing of sound level meters de
9、signed to conform to the specifications of IEC 61672-1:2002 were given in IEC 61672-2:2003. 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 Shock, S3 on Bioac
10、oustics, 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 the Acoustical Socie
11、ty 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 consumers, and to Federa
12、l, 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 organization and acti
13、vity 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 publication and distributio
14、n. 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 interests. Substantial
15、 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 existence does not in
16、 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 time. The procedures o
17、f 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) 923-2875 E-mail: asa
18、stdsacousticalsociety.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 written permission of
19、 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, without the prior
20、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 America All rights reserved iContents 1 Scope . 1 2 Normative references 1 3 Terms and definitions 2 4 Submission for testing . 2 5 Marki
21、ng of the sound level meter and information in the Instruction Manual 3 6 Mandatory facilities and general requirements 3 7 Environmental, electrostatic, and radio-frequency tests 6 7.1 General 6 7.2 Uncertainties for measurements of environmental test conditions . 7 7.3 Influence of static pressure
22、 . 7 7.4 Limits on air temperature, relative humidity and static pressure . 7 7.5 Acclimatization requirements for tests of the influence of air temperature and relative humidity . 8 7.6 Abbreviated test of the combined influence of air temperature and relative humidity 8 7.7 Influence of air temper
23、ature 10 7.8 Influence of relative humidity . 11 7.9 Influence of electrostatic discharges . 12 7.10 Influence of a.c. power-frequency and radio-frequency fields 13 8 Radio-frequency emissions and public power supply disturbances 16 9 Electroacoustical performance tests 17 9.1 General 17 9.2 Indicat
24、ion at the calibration check frequency 18 9.3 Directional response 18 9.4 Tests of frequency weightings with acoustical signals 20 9.5 Tests of frequency weightings with electrical signals 24 9.6 Corrections for the effect of reflections from the case of a sound level meter and diffraction around a
25、microphone 25 9.7 Corrections to obtain free-field or random-incidence sound levels . 26 9.8 Level linearity . 27 9.9 Under-range indication 28 9.10 Self-generated noise level . 29 9.11 Decay time constants for time weightings F and S . 29 9.12 Toneburst response for sound level meters that measure
26、time-weighted sound level 30 9.13 Toneburst response for sound level meters that measure sound exposure level or time-averaged sound level . 31 9.14 Response to sequences of repeated tonebursts for sound level meters that measure time-averaged sound level . 32 2014 Acoustical Society of America All
27、rights reserved ii9.15 Overload indication 32 9.16 C-weighted peak sound level . 33 9.17 Reset 34 9.18 Electrical output . 34 9.19 Timing facilities 34 9.20 Crosstalk in multi-channel sound level meter systems 34 9.21 Power supply . 34 10 Pattern evaluation report . 35 2014 Acoustical Society of Ame
28、rica All rights reserved iiiForeword This Foreword is for information only, and is not a part of the American National Standard ANSI/ASA S1.4-2014/Part 2 / IEC 61672-2:2013 American National Standard Electroacoustics Sound Level Meters Part 2: Pattern Evaluation Tests. As such, this Foreword may con
29、tain material that has not been subjected to public review or a consensus process. In 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 a
30、nd approved by Accredited Standards Committee S1 Acoustics, under its approved operating 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 measurem
31、ent and test, and terminology in the field of physical acoustics, including architectural acoustics, electroacoustics, sonics and ultrasonics, and underwater sound, but excluding those aspects which pertain to biological safety, tolerances, and comfort. This standard is identical to IEC 61672-2:2013
32、, 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 ANSI/ASA S1.4 / IEC 61672” replace the words “this part of IEC 61672” where they appear in the IE
33、C 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. The ANSI/ASA equivalents for the ISO standards in the IEC 61672 series and other referenced nationally adopted standards are g
34、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
35、672-3:2013. This nationally adopted international standard is one of three standards that, taken together, revise and replace ANSI/ASA S1.4-1983 (R2006), ANSI S1.4A-1985 (R2006) and ANSI S1.43-1997 (R2007). The subject matter in this document (Part 2) was not part of the superseded American National
36、 Standards. U.S. NOTE: The following introductory text describes the differences between the current version of IEC 61672-2 and the 2003 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. This second edit
37、ion cancels and replaces the first edition published in 2003. This second edition constitutes a technical revision. The main technical changes with regard to the previous edition are as follows: In this second edition, conformance to specifications is demonstrated when: a) measured deviations from d
38、esign goals do not exceed the applicable acceptance limits, and b) the uncertainty of measurement does not exceed the corresponding maximum permitted uncertainty, with both uncertainties determined for a coverage probability of 95 %. 2014 Acoustical Society of America All rights reserved iv At the t
39、ime 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, Detection Solutions . P.J. Battenberg M. Wurm (Alt.) Acoustical Society of Amer
40、ica . 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. Brauch ETS-Lindgren Acoustic Systems D. Winker M. Black (Alt.) G.R.A.S. Sound
41、 FAX: 631-923-2875; E-mail: asastdsacousticalsociety.org. AMERICAN NATIONAL STANDARD ANSI/ASA S1.4-2014/Part 2 / IEC 61672-2:2013 2014 Acoustical Society of America All rights reserved 1American National Standard Electroacoustics Sound Level Meters Part 2: Pattern Evaluation Tests 1 Scope This part
42、of ANSI/ASA S1.4/IEC 61672 provides details of the tests necessary to verify conformance to all mandatory specifications given in IEC 61672-1 for time-weighting sound level meters, integrating-averaging sound level meters, and integrating sound level meters. Pattern-evaluation tests apply for each c
43、hannel of a multi-channel sound level meter, as necessary. Tests and test methods are applicable to class 1 and class 2 sound level meters. The aim is to ensure that all laboratories use consistent methods to perform pattern-evaluation tests. NOTE 1 In this document, references to IEC 61672-1, IEC 6
44、1672-2, and IEC 61672-3 refer to the second editions unless stated otherwise. U.S. INFORMATIVE NOTE: In this document, references to IEC 61672-1, IEC 61672-2, and IEC 61672-3 refer to the three parts of ANSI/ASA S1.4-2014 / IEC 61672:2013. See the list provided in the Foreword. NOTE 2 Procedures for
45、 the pattern-evaluation testing of sound level meters designed to conform to the specifications of IEC 61672-1:2002 were given in IEC 61672-2:2003. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its applicati
46、on. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60942, Electroacoustics Sound calibrators IEC 61000-4-2:2008, Electromagnetic compatibility (EMC) Part 4-2: Testing and measurement
47、techniques Electrostatic discharge immunity test IEC 61000-4-3:2010, Electromagnetic compatibility (EMC) Part 4-3: Testing and measurement techniques Radiated, radio-frequency, electromagnetic-field immunity test IEC 61000-4-6:2008, Electromagnetic compatibility (EMC) Part 4-6: Testing and measureme
48、nt techniques Immunity to conducted disturbances, induced by radio-frequency fields IEC 61000-6-2:2005, Electromagnetic compatibility (EMC) Part 6-2: Generic standards Immunity for industrial environments IEC 61094-1, Measurement microphones Part 1: Specifications for laboratory standard microphones
49、 IEC 61094-5, Measurement microphones Part 5: Methods for pressure calibration of working standard microphones by comparison ANSI/ASA S1.4-2014/Part 2 / IEC 61672-2:2013 2014 Acoustical Society of America All rights reserved 2 IEC 61183, Electroacoustics Random-incidence and diffuse-field calibration of sound level meters IEC 61672-1, Electroacoustics Sound level meters Part 1: Specifications IEC 62585, Electroacoustics Methods to determine corrections to obtain the free-field response of a sound level meter C
