1. © Copyright 1999 Siemens ICP LLC - All Rights Reserved Presentation To 138 th Meeting of Acoustical Society of AmericaRev - 10/29/99 - HSB WIRELESS HEARING AID COMPATIBILITY ANSI STANDARD C63.19 PROJECT SCOPE SCOPE: ANSI C63.19 Methods of Measurement and Parametric Criteria for Hearing Aid Compatibility (HAC) with Wireless Communication Devices

2. © Copyright 1999 Siemens ICP LLC - All Rights Reserved Presentation To 138 th Meeting of Acoustical Society of AmericaRev - 10/29/99 - HSB WIRELESS HEARING AID COMPATIBILITY ANSI STANDARD C63.19 PROJECT HISTORY HISTORY Project Request Submitted in - April ‘96 Project Approved by ANSI C63 - August ‘96 Initiation of Validation - December ‘97 1st Meeting on Int’l harmonization - May ’98 Completion of Objective Validation & Consensus on Test Methods- June ’99 Completion of Subjective Validation & Consensus on Parametric Criteria- October ‘99

3. © Copyright 1999 Siemens ICP LLC - All Rights Reserved Presentation To 138 th Meeting of Acoustical Society of AmericaRev - 10/29/99 - HSB WIRELESS HEARING AID COMPATIBILITY ANSI STANDARD C63.19 PARTICIPATION DURING THE PROJECT HEARING AID INDUSTRY SUB-TOTAL - >21 participants from 15 organizations WIRELESS INDUSTRY SUB-TOTAL - >44 participants from 14 organizations OTHER ORGANIZATIONS SUB-TOTAL - >25 participants from 16 organizations GRAND TOTAL >90 participants from >45 organizations

4. © Copyright 1999 Siemens ICP LLC - All Rights Reserved Presentation To 138 th Meeting of Acoustical Society of AmericaRev - 10/29/99 - HSB WIRELESS HEARING AID COMPATIBILITY ANSI STANDARD C63.19 OPERATIONAL MODES ACOUTIC MODE: Acoustic output of the phone is received by the microphone of the hearing aid T-COIL MODE: Magnetic Field output containing the acoustic signal is received by an inductive coil (T- Coil) in the hearing aid

5. © Copyright 1999 Siemens ICP LLC - All Rights Reserved Presentation To 138 th Meeting of Acoustical Society of AmericaRev - 10/29/99 - HSB WIRELESS HEARING AID COMPATIBILITY ANSI STANDARD C63.19 TECHNICAL ISSUES FOR ACOUSTIC MODE: MATCH HEARING AID IMMUNITY WITH WIRELESS HANDSET EMISSIONS FOR T-COIL MODE: PROVIDE REQUIRED SIGNAL STRENGTH AND SIGNAL QUALITY

6. © Copyright 1999 Siemens ICP LLC - All Rights Reserved Presentation To 138 th Meeting of Acoustical Society of AmericaRev - 10/29/99 - HSB WIRELESS HEARING AID COMPATIBILITY ANSI STANDARD C63.19 Phone Tests ACOUSTIC MODE Near-Field Emissions T-COIL MODE Signal Strength Frequency Response Signal/Noise Ratio Hearing Aid Tests ACOUSTIC MODE Near-Field Immunity T-COIL MODE Near-Field Immunity in T-Coil Mode

7. © Copyright 1999 Siemens ICP LLC - All Rights Reserved Presentation To 138 th Meeting of Acoustical Society of AmericaRev - 10/29/99 - HSB WIRELESS HEARING AID COMPATIBILITY ANSI STANDARD C63.19 Overview of the Wireless Handset Tests The near-field EM emissions are assessed. The phone is categorized based on the peak in a contiguous 2/3 of the area normally used by the HA. A non-mandatory T-Coil mode test is available. Compliance with the T-Coil test allows addition of the “T”, for T-Coil, designation to the category classification. The T-Coil test includes a requirement for signal level, audio frequency response and signal quality.

8. © Copyright 1999 Siemens ICP LLC - All Rights Reserved Presentation To 138 th Meeting of Acoustical Society of AmericaRev - 10/29/99 - HSB WIRELESS HEARING AID COMPATIBILITY ANSI STANDARD C63.19 EM ASSESSMENT AREA ON HANDSET

9. © Copyright 1999 Siemens ICP LLC - All Rights Reserved Presentation To 138 th Meeting of Acoustical Society of AmericaRev - 10/29/99 - HSB WIRELESS HEARING AID COMPATIBILITY ANSI STANDARD C63.19 T-COIL TEST POSITIONS ON HANDSET

10. © Copyright 1999 Siemens ICP LLC - All Rights Reserved Presentation To 138 th Meeting of Acoustical Society of AmericaRev - 10/29/99 - HSB WIRELESS HEARING AID COMPATIBILITY ANSI STANDARD C63.19 USABILITY CATEGORIES  USABLE  NORMAL USE  EXCELLENT PERFORMANCE

11. © Copyright 1999 Siemens ICP LLC - All Rights Reserved Presentation To 138 th Meeting of Acoustical Society of AmericaRev - 10/29/99 - HSB WIRELESS HEARING AID COMPATIBILITY ANSI STANDARD C63.19 MANY POSSIBLE SOLUTIONS

12. © Copyright 1999 Siemens ICP LLC - All Rights Reserved Presentation To 138 th Meeting of Acoustical Society of AmericaRev - 10/29/99 - HSB WIRELESS HEARING AID COMPATIBILITY ANSI STANDARD C63.19 MANY POSSIBLE SOLUTIONS

13. © Copyright 1999 Siemens ICP LLC - All Rights Reserved Presentation To 138 th Meeting of Acoustical Society of AmericaRev - 10/29/99 - HSB WIRELESS HEARING AID COMPATIBILITY ANSI STANDARD C63.19 USER HAS CHOICES For Example: Owner of a U2 hearing aid will get good to excellent performance with a U1 or higher phone Owner of a U2 phone will get good to excellent performance with a U1 or higher hearing aid

14. © Copyright 1999 Siemens ICP LLC - All Rights Reserved Presentation To 138 th Meeting of Acoustical Society of AmericaRev - 10/29/99 - HSB WIRELESS HEARING AID COMPATIBILITY ANSI STANDARD C63.19 Overview of the Hearing Aids Tests The near-field EM immunity is assessed. The HA is tested using a dipole. The HA is tested near the dipole tip for E-Field immunity and near the dipole center for H-Field immunity. There is no HA T-Coil mode test, other than RF immunity. The HA is assumed to be designer to ANSI S-22 for its T-Coil performance.

15. © Copyright 1999 Siemens ICP LLC - All Rights Reserved Presentation To 138 th Meeting of Acoustical Society of AmericaRev - 10/29/99 - HSB WIRELESS HEARING AID COMPATIBILITY ANSI STANDARD C63.19 DIPOLE TEST LOCATIONS FOR HEARING AIDS