1、 ANSI/ASA S1.11-2014/Part 1 / IEC 61260-1:2014 AMERICAN NATIONAL STANDARD Electroacoustics Octave-band and Fractional-octave-band Filters Part 1: Specifications (a nationally adopted international standard) Accredited Standards Committee S1, Acoustics Standards Secretariat Acoustical Society of Amer
2、ica 1305 Walt Whitman Road, Suite 300 Melville, NY 11747 ANSI/ASA S1.11-2014/Part 1 /IEC61260-1:2014 The 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
3、 standards. The Acoustical 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 S1.11-2014/Part 1 / IEC 61260-1:2014 (Revision of ANSI/ASA S1.11-2004 R2009) AMERIC
4、AN NATIONAL STANDARD Electroacoustics Octave-band and Fractional-octave-band Filters Part 1: Specifications (a nationally adopted international standard) Secretariat: Acoustical Society of America Approved on July 2, 2014 by: American National Standards Institute, Inc. Abstract This standard provide
5、s performance requirements for analog, sampled-data, and digital implementations of band-pass filters that comprise a filter set or spectrum analyzer for acoustical measurements. It supersedes ANSI/ASA S1.11-2004 (R2009) American National Standard Specification for Octave-Band and Fractional-Octave-
6、Band Analog and Digital Filters, and is an identical national adoption of IEC 61260:2014 Electroacoustics Octave-band and fractional-octave-band filters, Part 1: Specifications. Significant changes from previous versions is that IEC 61260 has been adopted in full: (1) the original test methods of IE
7、C 61260 clause 5 that was moved to an informative annex was replaced as normative, (2) the term “band number,” was replaced, and (3) some references were removed. AMERICAN NATIONAL STANDARDS ON ACOUSTICS The Acoustical Society of America (ASA) provides the Secretariat for Accredited Standards Commit
8、tees S1 on Acoustics, S2 on Mechanical Vibration and 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 governmen
9、t representatives). The standards are published by the 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
10、 standards useful to the public, industry, and consumers, 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. Th
11、e ASA Standards Secretariat administers Committee organization 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 A
12、SA Standards Secretariat arranges for their publication 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
13、been reached by directly and materially affected interests. 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
14、 National Standard is completely voluntary. Their existence 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 Nati
15、onal Standard may be revised or withdrawn at any time. 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 Y
16、ork 11747 Telephone: 1 (631) 390-0215 Fax: 1 (631) 923-2875 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
17、 of the U.S. Copyright Act of 1976, without prior written 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
18、 any form, including an electronic retrieval system, without the prior written permission of the Acoustical Society of America (ASA). All requests pertaining to this standard should be submitted to ASA. 2014 Acoustical Society of America All rights reserved i Contents 1 Scope 1 2 Normative reference
19、s .1 3 Terms and definitions .2 4 Reference environmental conditions 6 5 Performance requirements .6 5.1 General . 6 5.2 Octave frequency ratio . 7 5.3 Reference frequency 7 5.4 Exact mid-band frequencies . 7 5.5 Nominal mid-band frequencies 8 5.6 Band-edge frequencies 8 5.7 Time-averaged signal lev
20、els 8 5.8 Filter attenuation. 9 5.9 Reference attenuation 9 5.10 Relative attenuation . 9 5.11 Normalized effective bandwidth . 11 5.12 Effective bandwidth deviation . 13 5.13 Linear operating range . 13 5.14 Time-invariant operation 14 5.15 Anti-alias filters . 15 5.16 Summation of output signals 1
21、5 5.17 Overload indicator 15 5.18 Filter decay time . 16 5.19 Maximum input signal 16 5.20 Output terminals and terminating impedances 16 5.21 Power supply check . 16 5.22 Sensitivity to various environments 17 5.23 Electrostatic-discharge and electromagnetic-compatibility requirements 17 6 Instrume
22、nt marking 20 7 Instruction manual . 20 7.1 General . 20 7.2 Operation 21 7.3 Testing 22 (informative) Relationship between tolerance interval, corresponding acceptance interval Annex Aand the maximum-permitted uncertainty of measurement 23 (normative) Maximum-permitted expanded uncertainties of mea
23、surement . 24 Annex B(informative) Examples of conformance assessment to specifications of this standard . 25 Annex CC.1 General . 25 C.2 Conformance criteria 25 C.3 Example test results . 26 ii 2014 Acoustical Society of America All rights reserved (informative) Base 2 filters 28 Annex D(normative)
24、 Nominal mid-band frequencies 29 Annex EE.1 Mid-band frequencies for octave-band and one-third-octave-band filters . 29 E.2 Mid-band frequencies for one-half-octave-band filters 29 E.3 Mid-band frequencies for other bandwidths 29 (informative) Normalized frequencies at breakpoints of acceptance limi
25、ts on minimum Annex Fand maximum relative attenuation for one-third-octave-band filters 31 (informative) Filter response to exponentially swept sinusoidal signals . 33 Annex GG.1 Exponential frequency sweep 33 G.2 Response of set of band-pass filters to a sweep . 33 (informative) Measurement of filt
26、er decay time . 36 Annex HH.1 General 36 H.2 Measurement of filter decay time . 36 Bibliography . 38 Tables Table 1 Acceptance limits on relative attenuation for octave-band filters . 10 Table 2 Limits for radiated disturbance of class B Information Technology Equipment (ITE) at a distance of 10 m 2
27、0 Table 3 Limits for conducted disturbance to the voltage of a public supply of electric power 20 Table B.1 Maximum-permitted expanded uncertainties of measurement 24 Table C.1 Examples of conformance assessment . 26 Table E.1 Mid-band frequencies for octave-band and one-third-octave-band filters in
28、 the audio range . 30 Table F.1 Acceptance limits on relative attenuation for one-third-octave-band filters 32 Figures Figure 1 Minimum and maximum limits on relative attenuation as a function of f/fm for class 1 and class 2 octave-band filters . 12 Figure A.1 Relationship between tolerance interval
29、, corresponding acceptance interval and the maximum-permitted uncertainty of measurement 23 Figure C.1 Examples of conformance assessment 27 Figure G.1 Relation between the logarithmic frequency scale and the linear time scale due to the exponential sweep 35 2014 Acoustical Society of America All ri
30、ghts reserved iii Foreword This Foreword is for information only, and is not a part of the American National Standard ANSI/ASA S1.11-2014/Part 1 / IEC 61260-1:2014 American National Standard Electroacoustics Octave-band and Fractional-octave-band Filters Part 1: Specifications. As such, this Forewor
31、d 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 of a group of definitions, standards, and specifications for use in acoustics. It was de
32、veloped 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 of Accredited Standards Committee S1 is as follows: Standards, specifications, methods of
33、 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 pertain to biological safety, tolerances, and comfort. This standard revises and replaces AN
34、SI/ASA S1.11-2004 (R2009) American National Standard Specification for Octave-band and Fractional-octave-band Analog and Digital Filters. This standard is an identical national adoption of IEC 61260-1 Ed 1.0 2014-02 Electroacoustics Octave-band and fractional-octave-band filters Part 1: Specificatio
35、ns, which was prepared by IEC/TC 29. However, in conformance with ANSI and IEC rules, the words “this part of ANSI/ASA S1.11 / IEC 61260” replace the words “this part of IEC 61260” where they appear in the IEC document, decimal points were substituted in place of the decimal commas used in IEC docum
36、ents, and American English spelling is used in place of British English spelling. This standard includes eight Annexes. Annexes B and E are normative and are considered to be a part of this standard. Annexes A, C, D, F, G, and H are informative and are not considered part of this standard. At the ti
37、me 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 Ame
38、rica . R.J. Peppin . R.D. Hellweg (Alt.) 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 2014 Acoustical Society of America All rights reserved iv Casella
39、 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. ANSI/ASA S1.11-2014/Part 1 / IEC 61260-1:2014 2014 Acoustical Society of America All rights reserved v INTRODUCTION IEC 61260:1995 and its Amendment 1:2001 a
40、re now separated into the following three parts of IEC 61260 series: Part 1: Specifications Part 2: Pattern evaluation tests (under consideration) Part 3: Periodic tests (under consideration) For assessments of conformance to performance specifications, ANSI/ASA S1.11/Part 1 / IEC 61260-1 uses diffe
41、rent criteria than were used for the IEC 61260:1995 edition. IEC 61260:1995 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 recommendations to account for uncertainty of
42、 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 deviation did or did not exceed the limits, the end-
43、user of the octave-band and fractional-octave-band filters 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 assessments of conform
44、ance in International Standards that it prepares. ANSI/ASA S1.11/Part 1 / IEC 61260-1 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 uncertai
45、nty of measurement does not exceed the corresponding maximum-permitted uncertainty. Acceptance limits are analogous to the tolerance limits allowances for design and manufacturing implied in the IEC 61260:1995. Actual and maximum-permitted uncertainties of measurement are determined for a coverage p
46、robability of 95 %. Unless more-specific information is available, the evaluation of the contribution of a specific filter or filter set to a total measurement uncertainty can be based on the acceptance limits and maximum-permitted uncertainties specified in this standard. AMERICAN NATIONAL STANDARD
47、 ANSI/ASA S1.11-2014/Part 1/ IEC 61260-1:2014 1 2014 Acoustical Society of America All rights reserved American National Standard Electroacoustics Octave-band and Fractional-octave-band Filters Part 1: Specifications (a nationally adopted international standard) 1 Scope 1.1 This part of the ANSI/ASA
48、 S1.11 / IEC 61260 series specifies performance requirements for analogue, sampled-data, and digital implementations of band-pass filters. The extent of the pass-band region of a filters relative attenuation characteristic is a constant percentage of the exact mid-band frequency for all filters of a
49、 given bandwidth. An instrument conforming to the requirements of this standard may contain any number of contiguous band-pass filters covering any desired frequency range. 1.2 Performance requirements are provided for two filter classes: class 1 and class 2. In general, specifications for class 1 and class 2 filters have 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. Maxi
