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T-Ratings: Mobile devices rated T3 or T4 meet
FCC requirements and are likely to generate
less interference to hearing devices than
mobile devices that are not labeled. T4 is the
better/higher of the two ratings. T-ratings
refer to enabling inductive coupling with
hearing aids operating in telecoil mode.
Hearing devices may also be rated. Your
hearing aid manufacturer or hearing health
professional may help you find this rating.
Higher ratings mean that the hearing device is
relatively immune to interference noise.
Under the current industry standard,
American National Standards Institute (ANSI)
C63.19, the hearing aid and wireless mobile
device rating values are added together to
indicate how usable they are together. For
example, if a hearing aid meets the M2 level
rating and the wireless mobile device meets
the M3 level rating, the sum of the two values
equals M5.
Under the standard, this should provide the
hearing aid user with normal use while using
the hearing aid with the particular wireless
mobile device. A sum of 6 or more would
indicate excellent performance.
However, these are not guarantees that all
users will be satisfied. T ratings work
similarly.
M3
+
T3
+
The HAC rating and measurement procedure
are described in the American National
Standards Institute (ANSI) C63.19 standard.
HAC for Newer Technologies
This phone has been tested and rated for use
with hearing aids for some of the wireless
technologies that it uses. However, there may
be some newer wireless technologies used in
this phone that have not been tested yet for
use with hearing aids.
It is important to try the different features of
this phone thoroughly and in different
locations, using your hearing aid or cochlear
implant, to determine if you hear any
interfering noise. Consult your service
provider or the manufacturer of this phone for
Health and Safety Information
M2
=
5
T2
=
5
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