1、 TIA-1083-B (Revision of TIA-1083-A) October 2015Telecommunications Communications Products Handset Magnetic Measurement Procedures and Performance Requirements ANSI/TIA-1083-B-2015 APPROVED: OCTOBER 26, 2015 NOTICE TIA Engineering Standards and Publications are designed to serve the public interest
2、 through eliminating misunderstandings between manufacturers and purchasers, facilitating interchangeability and improvement of products, and assisting the purchaser in selecting and obtaining with minimum delay the proper product for their particular need. The existence of such Standards and Public
3、ations shall not in any respect preclude any member or non-member of TIA from manufacturing or selling products not conforming to such Standards and Publications. Neither shall the existence of such Standards and Publications preclude their voluntary use by Non-TIA members, either domestically or in
4、ternationally. Standards and Publications are adopted by TIA in accordance with the American National Standards Institute (ANSI) patent policy. By such action, TIA does not assume any liability to any patent owner, nor does it assume any obligation whatever to parties adopting the Standard or Public
5、ation. This Standard does not purport to address all safety problems associated with its use or all applicable regulatory requirements. It is the responsibility of the user of this Standard to establish appropriate safety and health practices and to determine the applicability of regulatory limitati
6、ons before its use. Any use of trademarks in this document are for information purposes and do not constitute an endorsement by TIA or this committee of the products or services of the company. (From Standards Proposal No. ANSI/TIA-PN-1083-B-D1, formulated under the cognizance of the TIA TR-41 User
7、Premises Telecommunications Requirements, TR-41.3 Subcommittee on Analog and Digital Wireline Terminals. Published by TELECOMMUNICATIONS INDUSTRY ASSOCIATION Technology and Standards Department 1320 N. Courthouse Road, Suite 200 Arlington, VA 22201 U.S.A. PRICE: Please refer to current Catalog of TI
8、A TELECOMMUNICATIONS INDUSTRY ASSOCIATION STANDARDS AND ENGINEERING PUBLICATIONS or call IHS, USA and Canada (1-877-413-5187) International (303-397-2896) or search online at http:/www.tiaonline.org/standards/catalog/ All rights reserved Printed in U.S.A. NOTICE OF COPYRIGHT This document is copyrig
9、hted by the TIA. Reproduction of these documents either in hard copy or soft copy (including posting on the web) is prohibited without copyright permission. For copyright permission to reproduce portions of this document, please contact the TIA Standards Department or go to the TIA website (www.tiao
10、nline.org) for details on how to request permission. Details are located at: http:/www.tiaonline.org/standards/catalog/info.cfm#copyright or Telecommunications Industry Association Technology (b) there is no assurance that the Document will be approved by any Committee of TIA or any other body in it
11、s present or any other form; (c) the Document may be amended, modified or changed in the standards development or any editing process. The use or practice of contents of this Document may involve the use of intellectual property rights (“IPR”), including pending or issued patents, or copyrights, own
12、ed by one or more parties. TIA makes no search or investigation for IPR. When IPR consisting of patents and published pending patent applications are claimed and called to TIAs attention, a statement from the holder thereof is requested, all in accordance with the Manual. TIA takes no position with
13、reference to, and disclaims any obligation to investigate or inquire into, the scope or validity of any claims of IPR. TIA will neither be a party to discussions of any licensing terms or conditions, which are instead left to the parties involved, nor will TIA opine or judge whether proposed licensi
14、ng terms or conditions are reasonable or non-discriminatory. TIA does not warrant or represent that procedures or practices suggested or provided in the Manual have been complied with as respects the Document or its contents. If the Document contains one or more Normative References to a document pu
15、blished by another organization (“other SSO”) engaged in the formulation, development or publication of standards (whether designated as a standard, specification, recommendation or otherwise), whether such reference consists of mandatory, alternate or optional elements (as defined in the TIA Proced
16、ures for American National Standards) then (i) TIA disclaims any duty or obligation to search or investigate the records of any other SSO for IPR or letters of assurance relating to any such Normative Reference; (ii) TIAs policy of encouragement of voluntary disclosure (see TIA Procedures for Americ
17、an National Standards Annex C.1.2.3) of Essential Patent(s) and published pending patent applications shall apply; and (iii) Information as to claims of IPR in the records or publications of the other SSO shall not constitute identification to TIA of a claim of Essential Patent(s) or published pendi
18、ng patent applications. TIA does not enforce or monitor compliance with the contents of the Document. TIA does not certify, inspect, test or otherwise investigate products, designs or services or any claims of compliance with the contents of the Document. ALL WARRANTIES, EXPRESS OR IMPLIED, ARE DISC
19、LAIMED, INCLUDING WITHOUT LIMITATION, ANY AND ALL WARRANTIES CONCERNING THE ACCURACY OF THE CONTENTS, ITS FITNESS OR APPROPRIATENESS FOR A PARTICULAR PURPOSE OR USE, ITS MERCHANTABILITY AND ITS NONINFRINGEMENT OF ANY THIRD PARTYS INTELLECTUAL PROPERTY RIGHTS. TIA EXPRESSLY DISCLAIMS ANY AND ALL RESP
20、ONSIBILITIES FOR THE ACCURACY OF THE CONTENTS AND MAKES NO REPRESENTATIONS OR WARRANTIES REGARDING THE CONTENTS COMPLIANCE WITH ANY APPLICABLE STATUTE, RULE OR REGULATION, OR THE SAFETY OR HEALTH EFFECTS OF THE CONTENTS OR ANY PRODUCT OR SERVICE REFERRED TO IN THE DOCUMENT OR PRODUCED OR RENDERED TO
21、 COMPLY WITH THE CONTENTS. TIA SHALL NOT BE LIABLE FOR ANY AND ALL DAMAGES, DIRECT OR INDIRECT, ARISING FROM OR RELATING TO ANY USE OF THE CONTENTS CONTAINED HEREIN, INCLUDING WITHOUT LIMITATION ANY AND ALL INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES (INCLUDING DAMAGES FOR LOSS OF BUSINES
22、S, LOSS OF PROFITS, LITIGATION, OR THE LIKE), WHETHER BASED UPON BREACH OF CONTRACT, BREACH OF WARRANTY, TORT (INCLUDING NEGLIGENCE), PRODUCT LIABILITY OR OTHERWISE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. THE FOREGOING NEGATION OF DAMAGES IS A FUNDAMENTAL ELEMENT OF THE USE OF THE CONTE
23、NTS HEREOF, AND THESE CONTENTS WOULD NOT BE PUBLISHED BY TIA WITHOUT SUCH LIMITATIONS. ANSI/TIA-1083-B i TABLE OF CONTENTS FOREWORD. INTRODUCTION I 1 SCOPE 1 2 NORMATIVE REFERENCES 2 3 DEFINITIONS, ABBREVIATIONS AND ACRONYMS 3 3.1 DEFINITIONS . 3 3.2 ABBREVIATIONS AND ACRONYMS . 6 4 GENERAL TECHNICA
24、L REQUIREMENTS . 7 4.1 CATEGORIES OF CRITERIA . 7 4.2 COMPLIANCE WITH THE STANDARD 7 4.3 TEST SIGNALS AND METHODS . 7 4.3.1 Test Signals .7 4.3.2 Test Methods .7 4.4 CODEC INFORMATION FOR DIGITAL INTERFACES . 8 4.4.1 Narrowband G.711 Reference Codec 8 4.4.2 Wideband L16-256 Reference Codec .9 4.4.3
25、Other Reference Codecs 9 4.5 TEST ARRANGEMENTS . 10 4.5.1 Reference Codec Arrangement .10 4.5.2 Direct Digital Signal Generation Arrangement .10 4.5.3 General Test Setup Arrangement 11 4.5.4 DC Feed Circuit .12 5 HANDSET MAGNETIC PERFORMANCE REQUIREMENTS . 13 5.1 PERPENDICULAR AND TRANSVERSE REQUIRE
26、MENTS 13 5.2 METHOD OF MEASUREMENTS 17 5.3 DETERMINING THE MEASUREMENT POSITIONS . 20 6 REGULATORY HANDSET HEARING AID COMPATIBILITY MAGNETIC REQUIREMENTS . 23 ANNEX A (NORMATIVE) HALF-BAND INTEGRATOR 24 ANNEX B (INFORMATIVE) CORRELATION DATA 25 ANNEX C (INFORMATIVE) CORDLESS PHONE/HEARING AID TELEC
27、OIL MODE SIGNAL-TO-NOISE STUDY . 32 C.1 INTRODUCTION. 32 C.2 TEST SIGNALS, EQUIPMENT, AND SETUP . 32 C.3 EXPERIMENTAL PROCEDURE . 36 C.4 TEST RESULTS 38 C.5 CONCLUSIONS 40 C.6 REFERENCES 41 C.7 ACKNOWLEDGEMENTS 41 ANNEX D (INFORMATIVE) ISO R-40 AND 1/3 OCTAVE BAND FREQUENCIES 42 ANNEX E (INFORMATIVE
28、) BIBLIOGRAPHY . 43 ANSI/TIA-1083-B ii TABLE OF FIGURES Figure 1 Reference and Measurement Planes and Reference Axis . 5 Figure 2 Digital Telephone Set Test Arrangement with Reference Codec . 10 Figure 3 Digital Telephone Set Test Arrangement using Direct Digital Generation and Analysis 10 Figure 4
29、General Test Setup . 11 Figure 5 Feeding Bridge and Matching Pad Circuit for Analog Interfaces 12 Figure 6 Narrowband Analog Devices Best Fit Frequency Response Limits. 14 Figure 7 Narrowband Digital Device Best Fit Frequency Response Limits . 15 Figure 8 Wideband Analog and Digital Device Best Fit
30、Frequency Response Limits . 16 Figure 9 Perpendicular Measurement Position Area (Not to scale) 21 Figure 10 Transverse Measurement Position Area (Not to scale) 22 Figure A.1 Half-Band Integrator Response 24 Figure B.1 Correlation of Interference Rating to A-Weighted Noise Level . 29 Figure B.2 Perce
31、ntage of Interference Ratings vs A-Weighted Noise Level 30 Figure B.3 Average Score vs. Noise (dB(A/m) . 31 Figure C.1 ITU-T P.830 Modified IRS Send Characteristics . 33 Figure C.2 Typical Magnetic Source Frequency Response vs Requirement 34 Figure C.3 Minimum S/N for a “Normal Use” Rating . 39 Figu
32、re C.4 Signal-to-Noise vs. “Normal Use” S/N Ratios . 40 TABLE OF TABLES Table 1 1 kHz, 0 dBm0 rms Sine Wave Signal G.711 Mu-Law and A-Law 0 Periodic Sequence 8 Table 2 1 kHz, 0 dBm0 rms Sine Wave L16-256 Codec Periodic Sequence Representation values . 9 Table 3 Narrowband Analog Devices with a Low L
33、evel FI Best Fit Frequency Response Limits 14 Table 4 Narrowband Digital Device Best Fit Frequency Response Limits 15 Table 5 Wideband Analog and Digital Device Best Fit Frequency Response Limits 16 Table 6 Test Signals for Device Transmission Modes 17 Table A.1 Half-Band Integrator Response 24 Tabl
34、e B.1 Correlation Coefficients . 28 Table B.2 Average Score vs. Noise (dB(A/m) 31 Table C.1 Test Stimuli 34 Table D.1 ISO R-40 and 1/3 Octave Band Frequencies . 42 ANSI/TIA-1083-B FOREWORD (This foreword is not part of this standard.) This document is a TIA Telecommunications standard produced by Wo
35、rking Group TR-41.3.14 of Committee TR-41. This standard was developed in accordance with TIA procedural guidelines, and represents the consensus position of the Working Group and its parent Subcommittee TR-41.3, which served as the formulating group. There are five annexes in this Standard. Annex A
36、 is normative and is considered part of this Standard; Annex B, Annex C, Annex D, and Annex E are informative and are not considered part of this Standard. The leadership of the TR-41.3.14 Working Group (Chair: James Bress, AST Technology Labs, Inc) acknowledges the written contributions provided by
37、 the following individuals in the development of this standard. Organization Representative Previous Version(s) TIA-1083-B AST Technology Labs Don McKinnon Editor Editor AST Technology Labs James Bress Uniden Al Baum Editor - Etymotic Research Stephen Julstrom - Gallaudet University RERC on Telecomm
38、unications Access Linda Kozma-Spytek Industry Canada Jason Nixon - Industry Canada Magdoly Rondon Panasonic Corporation of America Tony Jasionowski Panasonic Corporation of America Robert Wegner - Starkey Laboratories David Preves - Starkey Laboratories Weili Lin - VTech Steve Kropp - VTech Steve Wh
39、itesell - Whitesell Consutling LLC Steve Whitesell Suggestions for improvement of this standard are welcome. They should be sent to: Telecommunications Industry Association Technology and Standards Department Suite 200 1320 North Courthouse Road Arlington, VA 22201 ( http:/www.tiaonline.org ) ANSI/T
40、IA-1083-B i INTRODUCTION In 2004, telephone manufacturers began to receive customer complaints regarding hearing aid interference problems with digital cordless telephones. At its August 2004 meeting, TIA TR41.3 sub-committee discussed a Gallaudet University presentation on the subject and possible
41、causes for the reported interference. The consensus belief was that, due to the low RF power levels used by cordless phones, the source of the reported interference was possibly magnetic. Further work towards confirming this belief and developing a testing method to characterize the magnetic interfe
42、rence was conducted during the remainder of 2004 and first half of 2005. This effort culminated with round robin tests being made on a number of cordless telephones by three different laboratories and then correlated with the subjective test results from a study conducted by Gallaudet University dur
43、ing the 2005 Convention of Self Help for Hard of Hearing People (SHHH) as documented in Annex C. A draft of TIA-1083 was then developed to document the test methods and provide performance requirements for magnetic noise based on the correlations obtained. Subsequently, the addition of signal-to-noi
44、se ratio performance requirements was suggested for inclusion in TIA-1083. To help quantify the signal-to-noise ratios needed by hearing aid users employing telecoil coupling from cordless phones, a collaborative study was conducted by Gallaudet University, Etymotic Research, and Motorola during the
45、 2006 Convention of the Hearing Loss Association of America (formerly SHHH) as documented in Annex C. Moreover, data obtained from this study were used to inform the standards process regarding the magnetic field orientation needs of hearing aids, also documented in Annex C. After publication of TIA
46、-1083 in 2007, industry feedback recommended that the document scope be expanded to include telephone devices with digital interfaces. TIA-1083-A was developed to address telephone devices with digital interfaces. In 2013, industry feedback recommended that the document scope be expanded to include
47、wideband magnetic performance and to allow the use of real speech for test signals. The recommendation for wideband magnetic performance was based on the results of a study conducted by the Telecom Access-RERC (a joint project of Gallaudet University and the University of Wisconsin; funded by U.S. D
48、ept. of Education grant H133E090001) during the 2012 convention of the Hearing Loss Association of America. The results of the study, presented by Linda Kozma-Spytek at the May, 2013 standards meeting, indicated that access to wideband telephone audio, as compared to typical narrowband telephone aud
49、io, improved speech understanding and lowered expenditures of mental effort for a group of 24 cochlear implantees. TIA-1083-B was developed to address telephone devices with wideband acoustics and to add real speech as a test signal. The Field Intensity and SNR specifications were adjusted when speech is used to reflect the reduced test levels for the speech test signal to avoid potential compression issues. The frequency response requirements were simplified to one template per t
