Transcript Presentation to SBC Consumer Advisory Panel

Presentation To EU Ministerial Conference
WIRELESS TELEPHONES
AND
HEARING AIDS
Stephen Berger
Siemens
Austin, Tx.
USA
© Copyright 2000 Siemens Information & Communication Products - All Rights Reserved
Rev – 04/11/00 - HSB
WIRELESS TELEPHONES
AND
HEARING AIDS
The Issue
 The RF transmission from a wireless
Telephone can cause interference (a buzz) in
some hearing aids.
 Hearing Aid users will hold a wireless
telephone very close to their hearing aid, where
the RF field is very high.
 Hearing Aids in T-Coil mode have special
Presentation To EU Ministerial Conference
problems due their normal operating
characteristics.
© Copyright 2000 Siemens Information & Communication Products - All Rights Reserved
Rev – 04/11/00 - HSB
Presentation To EU Ministerial Conference
WIRELESS TELEPHONES
AND
HEARING AIDS
© Copyright 2000 Siemens Information & Communication Products - All Rights Reserved
Rev – 04/11/00 - HSB
Presentation To EU Ministerial Conference
WIRELESS TELEPHONES
AND
HEARING AIDS
© Copyright 2000 Siemens Information & Communication Products - All Rights Reserved
Rev – 04/11/00 - HSB
Presentation To EU Ministerial Conference
WIRELESS TELEPHONES
AND
HEARING AIDS
© Copyright 2000 Siemens Information & Communication Products - All Rights Reserved
Rev – 04/11/00 - HSB
Presentation To EU Ministerial Conference
WIRELESS TELEPHONES
AND
HEARING AIDS
© Copyright 2000 Siemens Information & Communication Products - All Rights Reserved
Rev – 04/11/00 - HSB
Presentation To EU Ministerial Conference
WIRELESS TELEPHONES
AND
HEARING AIDS
© Copyright 2000 Siemens Information & Communication Products - All Rights Reserved
Rev – 04/11/00 - HSB
WIRELESS HEARING AID
COMPATIBILITY
HISTORY & PROCESS
 HISTORY
Presentation To EU Ministerial Conference
 FCC Summit
- 1996
 US, European & Australian







Research Started
- 1996
IEC 118-13 & Australian By-Stander
Project Approved
- 1996
ANSI User Project Approved
- August ‘96
Mature Draft & Initiation of Validation - December ‘97
1st Meeting on Int’l harmonization
- May ’98
OU Objective & Subjective Study
- Summer ’99
ANSI Balloting Initiated
- Nov. ’99
IEC Harmonization Effort
- Dec. ‘99
© Copyright 2000 Siemens Information & Communication Products - All Rights Reserved
Rev – 04/11/00 - HSB
WIRELESS HEARING AID COMPATIBILITY
ANSI STANDARD C63.19
PROJECT SCOPE
 SCOPE: ANSI C63.19
Presentation To EU Ministerial Conference
Methods of Measurement and
Parametric Criteria for
Hearing Aid Compatibility (HAC) with
Wireless Communication Devices
© Copyright 2000 Siemens Information & Communication Products - All Rights Reserved
Rev – 04/11/00 - 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
CURRENT ACTIVE PARTICIPANTS
30 participants from 19 organizations
Presentation To EU Ministerial Conference
© Copyright 2000 Siemens Information & Communication Products - All Rights Reserved
Rev – 04/11/00 - HSB
WIRELESS HEARING AID
COMPATIBILITY
Current Situation
 Advancement in Products
 RF Immune Hearing Aid Components
 Compatibility a Competitive Advantage in HA Market
 Phone Neckloops & Other Accessories
 CTIA Access Education Effort
 Research & Validation
 RERC study of intelligibility
 OU Validation Studies
 HAMPIIS Validation Studies
 ANSI Beginning Balloting Process
Presentation To EU Ministerial Conference
© Copyright 2000 Siemens Information & Communication Products - All Rights Reserved
Rev – 04/11/00 - HSB
WIRELESS HEARING AID
COMPATIBILITY
Summary – OU 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 EU Ministerial Conference
– 51.4% Exact Match
– 93.1% Exact Match or Better Than Predicted
Performance
© Copyright 2000 Siemens Information & Communication Products - All Rights Reserved
Rev – 04/11/00 - HSB
WIRELESS HEARING AID
COMPATIBILITY
Summary – OU Validation Studies
 Subjective Study – 18 Subjects / 6 Phones
 Test Accuracy
Presentation To EU Ministerial Conference
 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 unaccptable
© Copyright 2000 Siemens Information & Communication Products - All Rights Reserved
Rev – 04/11/00 - HSB
WIRELESS HEARING AID
COMPATIBILITY
TECHNICAL ISSUES
MATCH HEARING AID IMMUNITY WITH
WIRELESS HANDSET EMISSIONS
FOR T-COIL MODE:
PROVIDE SUFFICIENT SIGNAL
STRENGTH AND SIGNAL QUALITY
Presentation To EU Ministerial Conference
© Copyright 2000 Siemens Information & Communication Products - All Rights Reserved
Rev – 04/11/00 - HSB
WIRELESS HEARING AID COMPATIBILITY
ANSI STANDARD C63.19
 30 dB S/N
.7 AI
20 - 29 dB S/N
.5 - .6 AI
10 - 19 dB S/N
.3 - .4 AI
USABILITY CATEGORIES
Presentation To EU Ministerial Conference
USABLE
NORMAL USE
EXCELLENT PERFORMANCE
© Copyright 2000 Siemens Information & Communication Products - All Rights Reserved
Rev – 04/11/00 - HSB
WIRELESS HEARING AID COMPATIBILITY
ANSI STANDARD C63.19
MANY POSSIBLE SOLUTIONS
HANDSET EMISSIONS
HEARING AID IMMUNITY
Presentation To EU Ministerial Conference
USABLE
GOOD
USABLE
EXCELLENT
GOOD
USABLE
EXCELLENT
GOOD
© Copyright 2000 Siemens Information & Communication Products - All Rights Reserved
EXCELLENT
Rev – 04/11/00 - HSB
WIRELESS HEARING AID COMPATIBILITY
ANSI STANDARD C63.19
MANY POSSIBLE SOLUTIONS
Presentation To EU Ministerial Conference
U1
U2
U3
U3
U0
HANDSET EMISSIONS
HEARING AID IMMUNITY
U0
U1
U2
© Copyright 2000 Siemens Information & Communication Products - All Rights Reserved
Rev – 04/11/00 - 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
Presentation To EU Ministerial Conference
© Copyright 2000 Siemens Information & Communication Products - All Rights Reserved
Rev – 04/11/00 - HSB
WIRELESS HEARING AID COMPATIBILITY
ANSI STANDARD C63.19
WHAT ARE THE TESTS?
(For Hearing Aids)
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.
Presentation To EU Ministerial Conference
© Copyright 2000 Siemens Information & Communication Products - All Rights Reserved
Rev – 04/11/00 - HSB
WIRELESS HEARING AID COMPATIBILITY
ANSI STANDARD C63.19
DIPOLE TEST LOCATIONS
FOR HEARING AIDS
Electric Field Probe
Signal Generator
1 cm
Magnetic Field Probe
Dipole
Amplifier
Presentation To EU Ministerial Conference
© Copyright 2000 Siemens Information & Communication Products - All Rights Reserved
Rev – 04/11/00 - HSB
WIRELESS HEARING AID COMPATIBILITY
ANSI STANDARD C63.19
WHAT ARE THE TESTS?
(For Wireless Handset)
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.
Presentation To EU Ministerial Conference
© Copyright 2000 Siemens Information & Communication Products - All Rights Reserved
Rev – 04/11/00 - HSB
WIRELESS HEARING AID COMPATIBILITY
ANSI STANDARD C63.19
EM ASSESSMENT AREA ON HANDSET
Presentation To EU Ministerial Conference
5 cm x 5 cm
Control Area
10mm
Reference
Plane
Center Line
Measurement
Plane
© Copyright 2000 Siemens Information & Communication Products - All Rights Reserved
Rev – 04/11/00 - HSB
WIRELESS HEARING AID COMPATIBILITY
ANSI STANDARD C63.19
T-COIL TEST POSITIONS ON HANDSET
Presentation To EU Ministerial Conference
.
1
5
16 mm
Measurement
Radius
AXIAL
Location
4
Secondary
Auxiliary
Axis
(Example)
2

3
1
5
Axial
Measurement
Location
Radial
Measurement
Locations
(1,2,3,&4)
3
Measurement
Plane 10 mm
Receiver
Axis
.
R. M .
© Copyright 2000
Siemens Information & Communication Products - All Rights Reserved
.
Rev – 04/11/00 - HSB
WIRELESS HEARING AID
COMPATIBILITY
Summary
 A significant effort has been underway since 1995 to
assure that hearing aid users could use digital wireless
devices.
 Both industries have made significant advances and
have many products which work quite well together.
 IEC & Australia have standards for by-stander
protection.
 The ANSI C63.19 Standard has begun its final ballot.
 Efforts to harmonize the ANSI Standard with an IEC
draft are underway.
 Carriers are starting to require hearing aid compatible
Presentation To EU Ministerial Conference
phones in their contracts.
© Copyright 2000 Siemens Information & Communication Products - All Rights Reserved
Rev – 04/11/00 - HSB