1、 American National StandardMethods of Measurement of Compatibility between Wireless Communications Devices and Hearing Aids Sponsored by the Accredited Standards Committee C63 Electromagnetic Compatibility IEEE 3 Park Avenue New York, NY 10016-5997 USA 27 May 2011 Accredited by the American National
2、 Standards Institute ANSI C63.19-2011C63ANSI C63.19-2011 American National Standard Methods of Measurement of Compatibility between Wireless Communications Devices and Hearing Aids Accredited Standards Committee C63 Electromagnetic Compatibility accredited by the American National Standards Institut
3、e Secretariat Institute of Electrical and Electronics Engineers, Inc. Approved 14 April 2011 American National Standards Institute 1995 IEEE. Reprinted, with permission from the IEEE and Edwin L. Bronaugh (author), from his paper presented at the 1995 IEEE Symposium on EMC in Atlanta, GA. Figure I.2
4、 reprinted with permission from The Telecommunications Industry Association, TIA/EIA/IS-95-A, pp. 521, 1995. Acknowledgments The Accredited Standards Committee on Electromagnetic Compatibility, C63, thanks the IEEE and Edwin L. Bronaugh (author) for granting permission to use Helmholtz Coils for Cal
5、ibration of Probes and Sensors: Limits of Magnetic Field Accuracy and Uniformity, from the 1995 IEEE Symposium on EMC, Atlanta, GA, in Annex F of this standard. Abstract: Uniform methods of measurement for compatibility between hearing aids and wireless communications devices are set forth. Keywords
6、: American National Standard, C63.19, electromagnetic compatibility, hearing aid, hearing aid compatibility (HAC), measurement methods, operational compatibility, wireless communications device The Institute of Electrical and Electronics Engineers, Inc. 3 Park Avenue, New York, NY 10016-5997, USA Co
7、pyright 2011 by the Institute of Electrical and Electronics Engineers, Inc. All rights reserved. Published 27 May 2011. Printed in the United States of America. 2nd Printing 30 June 2011. The following ISBN and Product Number were incorrect in the 1st Printing on 27 May 2011. PDF: ISBN 978-0-7381-65
8、87STD97085 The correct ISBN and Product Number are as follows: PDF: ISBN 978-0-7381-6725-1 STD97147 IEEE is a registered trademark in the U.S. Patent (978) 750-8400. Permission to photocopy portions of any individual standard for educational classroom use can also be obtained through the Copyright C
9、learance Center. ANSI C63.19-2011 requires the use of a color monitor (and color printer) to view many of the graphics contained in this standard. Color is essential to the understanding of the graphics. iv Copyright 2011 IEEE. All rights reserved. Introduction In the fall of 1995, the Federal Commu
10、nications Commission (FCC) initiated a Steering Committee to initiate a summit on Hearing Aid Compatibility with Digital Wireless Telecommunications. The goal of the summit was to formalize and continue discussions among the three key affected interests in this issue: organizations representing peop
11、le with hearing loss, hearing aid manufacturers, and the digital wireless telephone industry. The ultimate purpose of the summit was to find a resolution of the interference problem that was acceptable to the industries involved. A summit meeting was held on January 34, 1996, in Washington, DC. At t
12、his summit meeting, three working groups were formed to pursue issue resolution. Subsequently, the Long-Term Solutions User and Bystander Interference Group reached a consensus that a standards project was needed to document the consensus definition of and method of measurement for hearing aid compa
13、tibility with wireless telecommunications. Subsequently ANSI C63was petitioned to undertake the joint standards projects documenting the methods of measurement and defining the limits for hearing aid compatibility with wireless telecommunications. At its April 1996 meeting, ANSI C63established a tas
14、k group under its subcommittee on medical devices (SC 8). The charge to this task group (TG C63.19) was to develop such standards in cooperation with representatives of organizations representing people with hearing loss, hearing aid manufacturers, the digital wireless telephone industry, and other
15、interested parties. ANSI C63.19-2001 was the result of that committees efforts. The FCC adopted this standard to provide the technical requirements for its Report and Order establishing mandatory requirements for wireless hearing aid compatibility on July 10, 2003 (FCC Docket 03-168 B30).aFollowing
16、the adoption by the FCC and for several reasons, including technical changes in wireless communications devices and hearing aids and new understanding coming from experience gained in working with the 2001 version of this standard, a new revision effort was started. The result of this revision effor
17、t culminated in the production of ANSI C63.19-2006. During the final approval process for the ANSI C63.19-2006 version, several issues were raised. The working group and ANSI ASC C63decided to open an amendment project to deal with these issues. The successful completion of that effort resulted in t
18、he publication of ANSI C63.19-2007. After the publication of ANSI C63.19-2007 the FCC issued Report and Order 06-107, allocating new wireless services to a frequency band in the 700 MHz range. As part of that rulemaking, the Commission requested that the C63committee revise the standard to support t
19、he application of HAC requirements to the 700 MHz band. The committee agreed to address this 700 MHz band and also decided to extend the upper frequency range to 6 GHz, taking into account newer technologies that are also covered by similar regulations. The working group and ANSI ASC C63decided to o
20、pen an amendment project to deal with these issues. The successful completion of that effort resulted in the publication of this version of the standard, ANSI C63.19-2011. aThe numbers in brackets correspond to those of the bibliography in Annex K. . This introduction is not a part of ANSI C63.19-20
21、11, American National Standard Methods of Measurement of Compatibility between Wireless Communications Devices and Hearing Aids. v Copyright 2011 IEEE. All rights reserved. Notice to users Laws and regulations Users of these documents should consult all applicable laws and regulations. Compliance wi
22、th the provisions of this standard does not imply compliance to any applicable regulatory requirements. Implementers of the standard are responsible for observing or referring to the applicable regulatory requirements. IEEE does not, by the publication of its standards, intend to urge action that is
23、 not in compliance with applicable laws, and these documents may not be construed as doing so. Copyrights This document is copyrighted by the IEEE. It is made available for a wide variety of both public and private uses. These include both use, by reference, in laws and regulations, and use in priva
24、te self-regulation, standardization, and the promotion of engineering practices and methods. By making this document available for use and adoption by public authorities and private users, the IEEE does not waive any rights in copyright to this document. Updating of IEEE documents Users of IEEE stan
25、dards should be aware that these documents may be superseded at any time by the issuance of new editions or may be amended from time to time through the issuance of amendments, corrigenda, or errata. An official IEEE document at any point in time consists of the current edition of the document toget
26、her with any amendments, corrigenda, or errata then in effect. In order to determine whether a given document is the current edition and whether it has been amended through the issuance of amendments, corrigenda, or errata, visit the IEEE Standards Association web site at http:/ieeexplore.ieee.org/x
27、pl/standards.jsp, or contact the IEEE at the address listed previously. For more information about the IEEE Standards Association or the IEEE standards development process, visit the IEEE-SA web site at http:/standards.ieee.org. Errata Errata, if any, for this and all other standards can be accessed
28、 at the following URL: http:/standards.ieee.org/reading/ieee/updates/errata/index.html. Users are encouraged to check this URL for errata periodically. Interpretations Current interpretations can be accessed at the following URL: http:/standards.ieee.org/reading/ieee/interp/ index.html. vi Copyright
29、 2011 IEEE. All rights reserved. Patents Attention is called to the possibility that implementation of this standard may require use of subject matter covered by patent rights. By publication of this standard, no position is taken with respect to the existence or validity of any patent rights in con
30、nection therewith. The IEEE is not responsible for identifying Essential Patent Claims for which a license may be required, for conducting inquiries into the legal validity or scope of Patents Claims or determining whether any licensing terms or conditions provided in connection with submission of a
31、 Letter of Assurance, if any, or in any licensing agreements are reasonable or non-discriminatory. Users of this standard are expressly advised that determination of the validity of any patent rights, and the risk of infringement of such rights, is entirely their own responsibility. Further informat
32、ion may be obtained from the IEEE Standards Association. vii Copyright 2011 IEEE. All rights reserved. Participants At the time this standard was published, the Accredited Standards Committee C63 Electromagnetic Compatibility had the following membership: Donald N. Heirman, Chair Daniel Hoolihan, Vi
33、ce Chair Mike Kipness, Secretary Organization Represented Name of Representative Alcatel-Lucent Dheena Moongilan Alliance for Telecommunications Industry Solutions (ATIS) James Turner American Council of Independent Laboratories (ACIL) . William Stumpf . Harry Hodes (Alt.) American Radio Relay Leagu
34、e (ARRL) Edward F. Hare . Kermit Carlson (Alt.) AT for RF applications, the anechoic enclosure is a shielded (against RF ingress or egress) metallic enclosure. Both types of enclosures use absorbing material (suited to the frequency range of use) to implement the low reflection characteristics desir
35、ed.14audio band: The audio-frequency range. See: audio frequency. audio band magnetic signaldesired (ABM1): Measured quantity of the desired magnetic signal. audio band magnetic signalundesired (ABM2): Measured quantity of the undesired magnetic signal, such as interference from battery current and
36、similar nonsignal elements. audio coupling mode: Transmission of a signal between two pieces of equipment using sound. audio frequency: Any frequency corresponding to a normally audible sound wave. (The IEEE Standards Dictionary: Glossary of Terms specifically with regard to radio-frequency interfer
37、ence and magnetic signal levels, frequency response, and signal-to-noise levels. dBm0: Power level in dBm, relative to a reference point called the zero transmission level point, or 0 TLP. A signal level of X dBm at the 0 TLP is designated X dBm0. In a codec, the 0 TLP is specified in relationship t
38、o the full-scale digital level or saturation. However, digital saturation is generally not 0 dBm0. For m-law codecs, 0 dBm0 is 3.17 dB below digital full scale. For A-law codecs, 0 dBm0 is 3.14 dB below digital full scale.15digital wireless telephone: Radio-frequency (RF)-based, wireless telephones
39、utilizing digital transmission formats over an air interface. NOTEGenerally these devices are regulated under Parts 15, 22, and 24 of the Rules of the Federal Communications Commission. Annex I contains a more detailed discussion of these devices. 14Notes in text, tables, and figures of a standard a
40、re given for information only and do not contain requirements needed to implement this standard. 15Further information on m-law and A-law codecs can be found in ITU G.711. ANSI C63.19-2011 American National Standard Methods of Measurement of Compatibility between Wireless Communication Devices and H
41、earing Aids 9 Copyright 2011 IEEE. All rights reserved. directional coupler: A transmission coupling device for separately (ideally) sampling (through a known coupling loss for measuring purposes) either the forward (incident) or the backward (reflected) wave in a transmission line. (The IEEE Standa
42、rds Dictionary: Glossary of Terms this conflicts with the use of the ear reference point as effective radiated power. modulation interference factor (MIF): For a modulated signal, the difference, in dB, found by subtracting the signals steady-state level, in dB, from its radio-frequency (RF) audio i
43、nterference level, in dB.16near-field region: That part of space between the antenna and the far-field region. (The IEEE Standards Dictionary: Glossary of Terms AP 145-1993) NOTE 1 The near field includes the quasi-static and induction fields varying as r3and r2, respectively, but it does not includ
44、e the radiation field varying as r1(The IEEE Standards Dictionary: Glossary of Terms (AP) 145-1993) net power: Forward power minus reflected power at the same location on a transmission line. SAE J551-1 personal communications service device: Intentional radiators operating in the frequency band spe
45、cified by the applicable regulating agency that provide a wide array of mobile and ancillary fixed communication services to individuals and businesses. Modification of FCC 15.303(g) radio-frequency (RF) audio interference level: The level of an unmodulated RF carrier that, when modulated by 80% 1 k
46、Hz sine-wave amplitude modulation (AM), produces the same output from a weighted square-law detector as does the modulated RF signal under test when measured with the same weighted square-law detector.17reflected power: That power traveling towards the amplifier (or generator) reflected by a load ca
47、used by impedance mismatch between the transmission line and load. SAE J551-1 shielded enclosure: A mesh or sheet metallic housing designed expressly for the purpose of separating electromagnetically the internal and the external environment. ANSI C63.14-2009 sound pressure level (SPL): The sound pr
48、essure level, in decibels, of a sound is 20 times the logarithm to the base 10 of the ratio of the pressure of this sound to the reference pressure. (The IEEE Standards Dictionary: Glossary of Terms & Definitions) NOTEFor this standard, the reference level shall be 20 Pa. tele-coil (T-Coil): An indu
49、ctive coil used in some hearing aids to allow reception of an audio band magnetic field signal, instead of an acoustic signal. The magnetic or inductive mode of reception is commonly used in conjunction with telephones, auditorium loop systems, and other systems that provide the required magnetic field output. transverse electromagnetic (TEM) cell: A measuring device that is designed to utilize the TEM mode over the frequency range of interest. Common examples are the two-port TEM cell (also known as the Crawford Cell) and the
