LG 236C User Manual page 89

Hearing devices may also be rated.
Your hearing device manufacturer
or hearing health professional may
help you find this rating. Higher
ratings mean that the hearing
device is relatively immune to
interference noise. The hearing aid
and wireless phone rating values
are then added together. A sum
of 5 is considered acceptable
for normal use. A sum of 6 is
considered for best use.
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 is
synonymous for T ratings. 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
For Your Safety
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.
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