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provide the hearing aid user with “normal
usage”while using their hearing aid with the
particular wireless phone. “Normal usage”in
this context is defined as a signal quality
that’s acceptable for normal operation. The
M mark is intended to be synonymous with
the U mark. The T mark is intended to be
synonymous with the UT mark. The M and
T marks are recommended by the Alliance
for Telecommunications Industries Solutions
(ATIS). The U and UT marks are referenced
in Section 20.19 of the FCC Rules. The
HAC rating and measurement procedure are
described in the American National Standards
Institute (ANSI) C63.19 standard.
To ensure that the Hearing Aid Compatibility
rating for your phone is maintained, secondary
transmitters such as Bluetooth and WLAN
components must be disabled during a call.
For information about hearing aids and digital
wireless phones:
Wireless Phones and Hearing Aid
Accessibility
http://www.accesswireless.org/
Gallaudet University, RERC
http://tap.gallaudet.edu/Voice/
FCC Hearing Aid Compatibility and Volume
Control
http://www.fcc.gov/cgb/dro/hearing.html
The Hearing Aid Compatibility FCC Order
http://hraunfoss.fcc.gov/edocs_public/
attachmatch/FCC-03-168A1.pdf
Hearing Loss Association of America
[HLAA]
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