Samsung Galaxy S II Online User's Manual page 206

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. 1 9, 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.
191 4A. Important Safety Information
M3 + M2
T3 + T2
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.
= 5
= 5