Samsung SM-G870ADGEATT User Manual
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are not labeled. M4 is the better/higher of the two
ratings. M-ratings refer to enabling acoustic coupling
with hearing aids that do not operate in telecoil mode.
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.
The HAC rating and measurement procedure are
described in the American National Standards Institute
(ANSI) C63.19 standard.
M3 + M2 = 5
T3 + T2 = 5