1、 ANSI/ASA S1.4-2014/Part 3 / IEC 61672-3:2013 AMERICAN NATIONAL STANDARD Electroacoustics Sound Level Meters Part 3: Periodic Tests (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 11747ANSI/ASA S1.4-2014/Part 3 /IEC 61672-3:2013The 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 Soci
3、ety 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 3 / IEC 61672-3:2013 AMERICAN NATIONAL STANDARD Electroacoustics Sound Level Meters Part 3: Periodi
4、c Tests (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 3 / IEC 61672-3:2013 describes procedures for periodic testing of time-weighting, integrating-av
5、eraging, and integrating sound level meters that were designed to conform to the class 1 or class 2 specifications of ANSI/ASA S1.4-2014/Part 1 / IEC 61672-1. The aim of the standard is to ensure that periodic testing is performed in a consistent manner by all laboratories. The purpose of periodic t
6、esting is to assure the user that the performance of a sound level meter conforms to the applicable specifications of ANSI/ASA S1.4-2014/Part 1 / IEC 61672-1 for a limited set of key tests and for the environmental conditions under which the tests were performed. Periodic tests described in this edi
7、tion of ANSI/ASA S1.4-2014/Part 3 / IEC 61672-3 apply to sound level meters for which the manufacturer claims conformance to the specifications of the second edition of ANSI/ASA S1.4-2014/Part 1 / IEC 61672-1. Periodic tests described in ANSI/ASA S1.4-2014/Part 3 / IEC 61672-3 apply to sound level m
8、eters for which the model has been, or has not been, pattern approved by an independent testing organization responsible for pattern approvals in accordance with the test procedures of ANSI/ASA S1.4-2014/Part 2 / IEC 61672-2. Procedures for the periodic testing of sound level meters designed to conf
9、orm to the specifications of IEC 61672-1:2002 were given in IEC 61672-3:2006. ii 2014 Acoustical Society of AmericaAll rights reserved Foreword This Foreword is for information only, and is not a part of the American National Standard ANSI/ASA S1.4-2014/Part 3 / IEC 61672-3:2013 American National St
10、andard Electroacoustics Sound Level Meters Part 3: Periodic Tests. As such, this Foreword may contain 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
11、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 operating procedures. Those procedures have been accredited by the American National Standards Institute (ANSI). The Scope o
12、f Accredited Standards Committee S1 is as follows: Standards, specifications, methods of measurement 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 pert
13、ain to biological safety, tolerances, and comfort. This nationally adopted international standard is a new standard and does not revise or replace any pre-existing American National Standard. This standard is identical to IEC 61672-3:2013, which was prepared by IEC Technical Committee 29, in coopera
14、tion with the International Organization of Legal Metrology (OIML). However, in conformance with ANSI and IEC rules, the words “this part of ANSI/ASA S1.4-2014 / IEC 61672“ replace the words “this part of IEC 61672“ where they appear in the IEC document, decimal points were substituted in place of t
15、he decimal commas used in IEC documents, and American English spelling is used in place of British English spelling. This standard includes five Annexes. Annexes B, D and E are normative and are considered to be a part of this standard. Annexes A and C are informative and are not considered part of
16、this standard. The ANSI/ASA equivalents for the IEC standards in the IEC 61672 series are given 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 61672-2:201
17、3. ANSI/ASA S1.4-2014/Part 3 / IEC 61672-3:2013 is an identical national adoption of IEC 61672-3:2013. This nationally adopted international standard is one of three standards that, taken together, revise and replace ANSI S1.4-1983 (R 2006), ANSI S1.4A-1985 (R 2006) and ANSI S1.43-1997 (R 2007). The
18、 subject matter in this document (Part 3) was not part of the superseded American National Standards. iii 2014 Acoustical Society of AmericaAll rights reserved At the time this Standard was submitted to Accredited Standards Committee S1, Acoustics for approval, the membership was as follows: R.J. Pe
19、ppin, Chair A. Scharine, Vice-Chair S.B. Blaeser, Secretary 3M Personal Safety Division, Detection 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 Assoc
20、iation 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 FAX: 631-923-2875; E-mail: asastdsacousticalsociety.org. AMERICAN NATIONAL STANDARD ANSI/ASA S1.4-2014/Part 3 / IEC 61672-3:2013 20
21、14 Acoustical Society of AmericaAll rights reserved 1 Electroacoustics Sound Level Meters Part 3: Periodic Tests 1 Scope This 2014 edition of ANSI/ASA S1.4-2014/Part 3 / IEC 61672-3 describes procedures for periodic testing of time-weighting, integrating-averaging, and integrating sound level meters
22、 that were designed to conform to the class 1 or class 2 specifications of the second edition of IEC 61672-1. The aim of the standard is to ensure that periodic testing is performed in a consistent manner by all laboratories. NOTE 1 In this document, references to IEC 61672-1, IEC 61672-2, and IEC 6
23、1672-3 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 the periodic test
24、ing of sound level meters designed to conform to the specifications of IEC 61672-1:2002 were given in IEC 61672-3:2006. The purpose of periodic testing is to assure the user that the performance of a sound level meter conforms to the applicable specifications of IEC 61672-1 for a limited set of key
25、tests and for the environmental conditions under which the tests were performed. The extent of the tests in this part of ANSI/ASA S1.4 / IEC 61672 is deliberately restricted to the minimum considered necessary for periodic tests. Periodic tests described in this edition of ANSI/ASA S1.4/Part 3 / IEC
26、 61672-3 apply to sound level meters for which the manufacturer claims conformance to the specifications of the second edition of IEC 61672-1. Periodic tests described in this part of ANSI/ASA S1.4 / IEC 61672 apply to sound level meters for which the model has been, or has not been, pattern approve
27、d by an independent testing organization responsible for pattern approvals in accordance with the test procedures of the second edition of IEC 61672-2. Because of the limited extent of the periodic tests, if evidence of pattern approval is not publicly available, no general conclusion about conforma
28、nce to the specifications of IEC 61672-1 can be made, even if the results of the periodic tests conform to all applicable requirements of this edition of ANSI/ASA S1.4/Part 3 / IEC 61672-3. 2 Normative references The following documents, in whole or in part, are normatively referenced in this docume
29、nt 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) applies. IEC 60942, Electroacoustics Sound calibrators IEC 61094-5, Measurement microphones Part 5: Met
30、hods for pressure calibration of working standard microphones by comparison ANSI/ASA S1.4-2014/Part 3 / IEC 61672-3:2013 2 2014 Acoustical Society of AmericaAll rights reserved IEC 61094-6, Measurement microphones Part 6: Electrostatic actuators for determination of frequency response IEC 61183, Ele
31、ctroacoustics Random-incidence and diffuse-field calibration of sound level meters IEC 61672-1, Electroacoustics Sound level meters Part 1: Specifications IEC 61672-2, Electroacoustics Sound level meters Part 2: Pattern evaluation tests IEC 62585, Electroacoustics Methods to determine corrections to
32、 obtain the free-field response of a sound level meter ISO/IEC Guide 98-3, Uncertainty of measurement Part 3: Guide to the expression of uncertainty in measurement (GUM:1995) ISO/IEC Guide 99, International vocabulary of metrology Basic and general concepts and associated terms (VIM) 3 Submission fo
33、r testing 3.1 An instruction manual applicable to the model and version of the sound level meter shall be available in order to perform periodic tests of a sound level meter. If an applicable Instruction Manual is not submitted along with the sound level meter, nor available at the laboratory, nor p
34、ublicly accessible from the Internet web site of the manufacturer or supplier of the sound level meter, then no periodic tests shall be performed. 3.2 The source for the instruction manual shall be described in the documentation for the periodic tests. 3.3 All items or accessories for the sound leve
35、l meter that are necessary for periodic testing shall accompany the sound level meter when it is submitted for testing. A device specified in the instruction manual for inserting electrical signals equivalent to signals from the microphone shall also be submitted if requested by the laboratory. 3.4
36、Periodic tests as described in this part of ANSI/ASA S1.4 / IEC 61672 shall not be performed unless the markings on the sound level meter are as required by IEC 61672-1 or there is evidence that the sound level meter was originally so marked. The serial number and the model designation shall be visi
37、ble on the sound level meter. 3.5 Data required to perform the periodic tests shall be available and the source of the data shall be recorded and reported by the laboratory. The data shall include all relevant information required by IEC 61672-1 and IEC 62585. 3.6 A sound calibrator shall be availab
38、le. The sound calibrator shall be supplied with the sound level meter, if required by the user or if requested by the laboratory, or shall be supplied by the laboratory. If a suitable sound calibrator is supplied by the user, it shall be used by the laboratory to establish the acoustical sensitivity
39、 of the sound level meter. ANSI/ASA S1.4-2014/Part 3 / IEC 61672-3:2013 2014 Acoustical Society of AmericaAll rights reserved 3 4 Conformance 4.1 Conformance to a performance specification is demonstrated when the following criteria are both satisfied: (a) a measured deviation from a design goal doe
40、s not exceed the applicable acceptance limit and (b) the corresponding uncertainty of measurement does not exceed the corresponding maximum-permitted uncertainty of measurement given in IEC 61672-1 for the same coverage probability of 95 %. IEC 61672-1 gives example assessments of conformance using
41、these criteria. 4.2 For laboratories performing periodic tests, the uncertainties associated with all measurements shall be determined in accordance with the procedures of ISO/IEC Guide 98-3. Metrological terms shall be as defined in ISO/IEC Guide 99. Actual measurement uncertainties shall be calcul
42、ated for a coverage probability of 95 %. Calculation of the uncertainty of measurement for a particular test should consider at least the following components, as applicable. Other uncertainty components are noted in Clauses 7, 12, and 13. The uncertainty attributed to calibration of the individual
43、instruments and equipment used to perform the test, including the sound calibrator and any free-field facility; The uncertainty resulting from environmental effects or adjustments; The uncertainty resulting from small errors that may be present in the applied signals; The uncertainty attributed to e
44、ffects associated with the repeatability of the results of the measurements. When a laboratory is only required to make a single measurement, it is necessary for the laboratory to make an estimate of the contribution of random effects to the total uncertainty. The estimate should be determined from
45、an evaluation of several measurement results previously obtained for a similar sound level meter; The uncertainty associated with the resolution of the display device of the sound level meter under test. For digital display devices that indicate signal levels with a resolution of 0.1 dB, the uncerta
46、inty component should be taken as a rectangular distribution with semi-range of 0.05 dB; The uncertainty associated with the device used to mount the sound level meter in the free-field test facility; The uncertainty resulting from the deviation of the sound field in the free-field test facility fro
47、m an ideal free sound field; and The uncertainty associated with each correction applied to the measurement data. 4.3 If an actual uncertainty of measurement for a test performed by the laboratory exceeds the corresponding maximum-permitted uncertainty, the result of the test shall not be used to ev
48、aluate conformance to this part of ANSI/ASA S1.4 / IEC 61672 for periodic testing. 4.4 A laboratorys actual uncertainty, without inclusion of the uncertainty of the manufacturers free-field or random-incidence correction data, shall not exceed the corresponding maximum-permitted uncertainty from IEC
49、 61672-1. However, when the uncertainty of the manufacturers correction data is included it is possible that an actual uncertainty of measurement may exceed the corresponding maximum-permitted uncertainty only because the uncertainty of the manufacturers correction data was a significant part of the laboratorys uncertainty budget. In this event, testing may proceed, but the documentation for the periodic tests shall include a statement to explain the reasons that the results of a test did not conform to a spe
