Presentation To ATIS HAC Incubator Overview of ANSI
Presentation To ATIS HAC Incubator Overview of ANSI C 63. 19 - Wireless Hearing Aid Compatibility Stephen Berger TEM Consulting www. temconsulting. com (512) 864 -3365 stephen. berger@ieee. org © Copyright 2003 TEM Consulting, LP - All Rights Reserved Rev – 07/21/03 - HSB
• Background & History • Overview of ANSI C 63. 19 • Possible Actions Presentation To ATIS HAC Incubator © Copyright 2003 TEM Consulting, LP - All Rights Reserved Rev – 07/21/03 - HSB
TECHNICAL ISSUES l FOR MICROPHONE & T-COIL MODE Match Hearing Aid Immunity with Mobile Handset Emissions l FOR T-COIL MODE only: Provide sufficient T-Coil Signal Strength and Signal Quality Presentation To ATIS HAC Incubator © Copyright 2003 TEM Consulting, LP - All Rights Reserved Rev – 07/21/03 - HSB
HISTORY l‘Hear It Now’ Petition Filed - Fall ’ 95 l. FCC Summit - 1996 l. IEC 118 -13 & Australian Project Approved - 1996 l. ANSI User Project Approved - Aug. ’ 96 l. Oklahoma U. Objective & Subjective Study - Summer ’ 00 l. IEC Harmonization Effort - Dec. ’ 99 l. WAC Petition - Dec. ’ 00 l. ANSI C 63. 19 Approved - Jan. ’ 01 l. Revision for 3 G & GTEM Approved - Feb. ’ 01 l. FCC NPRM - Jan. ’ 02 l. FDA Adopts ANSI C 63. 19 - Sept. ’ 02 (standard included in requirements for middle ear devices) l. FCC Rulemaking - July. ’ 03 l. ATIS HAC Incubator Formed - July ‘ 03 Presentation To ATIS HAC Incubator © Copyright 2003 TEM Consulting, LP - All Rights Reserved Rev – 07/21/03 - HSB
Project Scope • Methods of Measurement and • Parametric Criteria for: • Hearing Aid Compatibility (HAC) with • Wireless Communication Devices Presentation To ATIS HAC Incubator © Copyright 2003 TEM Consulting, LP - All Rights Reserved Rev – 07/21/03 - HSB
Standard Title American National Standard for Methods of Measurement of Compatibility between Wireless Devices and Hearing Aids Presentation To ATIS HAC Incubator ANSI C 63. 19 -2001 © Copyright 2003 TEM Consulting, LP - All Rights Reserved Rev – 07/21/03 - HSB
Standard Development • Well over two dozen meetings over three years and untold hours of investigation – Laboratory tests using hearing impaired volunteers – Laboratory tests showing the cell phone effects on wide range of Hearing Aids • Used the rigorous ANSI ASC C 63 balloting process including a public review by ANSI Presentation To ATIS HAC Incubator © Copyright 2003 TEM Consulting, LP - All Rights Reserved Rev – 07/21/03 - HSB
PROJECT PARTICIPATION l. HEARING AID INDUSTRY SUB-TOTAL - 21 participants from 15 organizations l. WIRELESS INDUSTRY SUB-TOTAL - 44 participants from 14 organizations l. OTHER ORGANIZATIONS SUB-TOTAL - 25 participants from 16 organizations TOTAL Presentation To ATIS HAC Incubator 90 participants from 45 organizations © Copyright 2003 TEM Consulting, LP - All Rights Reserved Rev – 07/21/03 - HSB
Standard Development • Work in ANSI ASC C 63 Subcommittee 8 (Medical EMC) – Over 50 members on task group at time of ballot Presentation To ATIS HAC Incubator • • Food and Drug Administration Federal Communications Commission Testing Laboratories Hearing Aid/Cell Phone Manufacturers Hearing Industries Association Universities Hearing Aid Research Organizations Consultants © Copyright 2003 TEM Consulting, LP - All Rights Reserved Rev – 07/21/03 - HSB
Overview of Standard Summary of Sections – Sections 1 -3 – Introductory Material Presentation To ATIS HAC Incubator • Overview – Scope – Purpose – Organization of document • References • Definitions, acronyms, and abbreviations © Copyright 2003 TEM Consulting, LP - All Rights Reserved Rev – 07/21/03 - HSB
Overview of Standard Summary of Sections – Section 4 – Test of Phone RF Emissions Presentation To ATIS HAC Incubator • Test equipment and facilities • Test set-up and validation • Near-field test procedure © Copyright 2003 TEM Consulting, LP - All Rights Reserved Rev – 07/21/03 - HSB
Overview of Standard Summary of Sections – Section 5 – Test of HA RF Immunity Presentation To ATIS HAC Incubator • Test facilities and equipment • Test set-up and validation • RF immunity test procedure (Key element) © Copyright 2003 TEM Consulting, LP - All Rights Reserved Rev – 07/21/03 - HSB
Presentation To ATIS HAC Incubator Hearing Aid Immunity Test Setup © Copyright 2003 TEM Consulting, LP - All Rights Reserved Rev – 07/21/03 - HSB
Overview of Standard Summary of Sections – Section 6 – Test of Phone T-Coil Signal Presentation To ATIS HAC Incubator • Test facilities and equipment • Test configurations and set-up • Test procedure for audio band magnetic field © Copyright 2003 TEM Consulting, LP - All Rights Reserved Rev – 07/21/03 - HSB
Presentation To ATIS HAC Incubator Phone T-Coil Signal Test Setup © Copyright 2003 TEM Consulting, LP - All Rights Reserved Rev – 07/21/03 - HSB
Overview of Standard Summary of Sections – Section 7 – HA Performance Criteria Presentation To ATIS HAC Incubator • Articulation weighting factor • Audio coupling mode • Audio band magnetic coupling mode • Accessories and options © Copyright 2003 TEM Consulting, LP - All Rights Reserved Rev – 07/21/03 - HSB
Presentation To ATIS HAC Incubator MANY POSSIBLE RF SOLUTIONS Eliminated by FCC Rulemaking © Copyright 2003 TEM Consulting, LP - All Rights Reserved Rev – 07/21/03 - HSB
Section 7 –RF Performance Criteria Presentation To ATIS HAC Incubator © Copyright 2003 TEM Consulting, LP - All Rights Reserved Rev – 07/21/03 - HSB
Section 7 –RF Performance Criteria Presentation To ATIS HAC Incubator © Copyright 2003 TEM Consulting, LP - All Rights Reserved Rev – 07/21/03 - HSB
Section 7 –T-Coil Requirements Presentation To ATIS HAC Incubator • T-Coil Signal Strength • T-Coil Signal Frequency Response • T-Coil Signal Quality © Copyright 2003 TEM Consulting, LP - All Rights Reserved Rev – 07/21/03 - HSB
Section 7. 3. 1 –T-Coil Signal Strength Axial -13 d. B (A/m) (. 22 A/m) Radial -18 d. B (A/m) (. 13 A/m) Presentation To ATIS HAC Incubator © Copyright 2003 TEM Consulting, LP - All Rights Reserved Rev – 07/21/03 - HSB
Section 7. 3. 2 –T-Coil Frequency Response Presentation To ATIS HAC Incubator © Copyright 2003 TEM Consulting, LP - All Rights Reserved Rev – 07/21/03 - HSB
Section 7. 3. 3 –T-Coil Signal Quality Presentation To ATIS HAC Incubator © Copyright 2003 TEM Consulting, LP - All Rights Reserved Rev – 07/21/03 - HSB
Overview of Standard Summary of Sections – Section 8: Calibration and measurement uncertainty Presentation To ATIS HAC Incubator • General • Ambient conditions • Specific calibration requirements • Measurement uncertainty © Copyright 2003 TEM Consulting, LP - All Rights Reserved Rev – 07/21/03 - HSB
Overview of Standard Summary of Sections – Section 9 Test Report Presentation To ATIS HAC Incubator • Test plan • Applicable standards • Equipment unit tested • Test configuration • List of test equipment • Units of measurement © Copyright 2003 TEM Consulting, LP - All Rights Reserved Rev – 07/21/03 - HSB
Overview of Standard Summary of Annexes – – – – Definition of reference axes Acoustic test frequencies Equipment and set-up calibration Test equipment specifications Sample measurement uncertainty estimates Use of Helmholtz coils for calibration RF envelope comparison for US Wireless Communications devices – Explanation of rationale used in standard – Alternate test method for RF immunity Presentation To ATIS HAC Incubator © Copyright 2003 TEM Consulting, LP - All Rights Reserved Rev – 07/21/03 - HSB
Effectiveness of Standard Oklahoma University Validation Studies – Objective Study – 10 Phones / 8 HA • Predicted Result – 38. 8 % Excellent – 28. 8% Recommended – 67. 6% Recommended or Better • Actual Result – 41. 7 % Excellent – 26. 4% Recommended – 68. 1% Recommended or Better – Test Accuracy Presentation To ATIS HAC Incubator – 51. 4% Exact Match – 93. 1% Exact Match or Better Than Predicted Performance © Copyright 2003 TEM Consulting, LP - All Rights Reserved Rev – 07/21/03 - HSB
Effectiveness of Standard Oklahoma University Validation Studies – Subjective Study – 18 Subjects / 6 Phones – Test Accuracy Presentation To ATIS HAC Incubator • 6 Hearing Aids were good with all phones • Some Hearing Aids were not acceptable with any phone • There is a middle ground where a Hearing Aid / Phone combination must be tried by the user. – Some users will find the combination perfectly acceptable – Other users, with the same test results will find the combination unacceptable © Copyright 2003 TEM Consulting, LP - All Rights Reserved Rev – 07/21/03 - HSB
Presentation To ATIS HAC Incubator GTEM – Dipole Illumination Test Repeatability (Max. Reading) – (Min. Reading) (d. B) © Copyright 2003 TEM Consulting, LP - All Rights Reserved Rev – 07/21/03 - HSB
Considerations for Next Revision l. Elimination of analog requirement. l. Reduction in number of test positions for HA. l. Phone RF - Eliminate H-Field test l. HA RF – Harmonize with IEC 60118 -13 l. T-Coil – Change test positions l. T-Coil – Develop isotropic probe l. T-Coil – Implement FFT method for Freq. Resp. l. T-Coil – Move to straight A-Weighted S/N l. Move from parametric to end result based test Presentation To ATIS HAC Incubator © Copyright 2003 TEM Consulting, LP - All Rights Reserved Rev – 07/21/03 - HSB
Summary l. A significant effort has been underway since 1995 to assure that hearing aid users could use digital wireless devices. l. Both industries (cell phone and hearing aid) have made significant advances and have many products which work quite well together. l. The ANSI C 63. 19 Standard provides compatibility. l. Consensus recommendations with supporting technical data needed Presentation To ATIS HAC Incubator for the next edition of C 63. 19 © Copyright 2003 TEM Consulting, LP - All Rights Reserved Rev – 07/21/03 - HSB
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