LG K20 PLUS Guia De Inicio Rapido página 30

M-Ratings: Phones rated M3 or M4 meet FCC requirements
and are likely to generate less interference to hearing devices
than phones that are not labeled. M4 is the better/higher of
the two ratings.
T-Ratings: Phones rated T3 or T4 meet FCC requirements and
are likely to generate less interference to hearing devices than
phones that are not labeled. T4 is the better/ higher of the
two ratings.
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 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's 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.
To ensure that the Hearing Aid Compatibility rating for your
phone is maintained, secondary transmitters such as
Bluetooth and WLAN components must be disabled during a
call.
For information about hearing aids and digital wireless phones
Wireless Phones and Hearing Aid Accessibility
http://www.accesswireless.org/
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