FCC HEARING-AID
COMPATIBILITY (HAC)
REGULATIONS FOR
WIRELESS DEVICES
123
For information about hearing aids and
digital wireless phone
•
Fcc Hearing Aid Compatibility and Volume
Control http://www.fcc.gov/cgb/dro/hearing.
html
•
Gallaudet University, RERC
http://tap.gallaudet.edu/DigWireless.KS/
DigWireless.htm
•
Self Help for Hard of Hearing People
Inc. [SHHH] www.hearingloss.org/hat/
TipsWirelessPhones.htm
•
The Hearing Aid Compatibility FCC Order
http://hraunfoss.fcc.gov/edocs_public/attach-
match/ FCC-03-168A1.pdf
SAFETY AND
WARRANTY
FCC HEARING-AID
COMPATIBILITY (HAC)
REGULATIONS FOR
WIRELESS DEVICES
122
In the above example, if a hearing aid meets
the M2 level rating and the wireless phone
meets the M3 level rating, the sum of the
two values equal M5. This should 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 is 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.
SAFETY AND
WARRANTY
070427_PN-310_EN_M_REV01.indd 122-123
070427_PN-310_EN_M_REV01.indd 122-123
2007.5.7 11:13:14 AM
2007.5.7 11:13:14 AM
Summary of Contents for CDM8905
Page 2: ...User Guide CDM8905...