LG G4 User Manual page 99

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/
Gallaudet University, RERC
http://tap.gallaudet.edu/Voice/
FCC Hearing Aid Compatibility and Volume Control
http://www.fcc.gov/cgb/dro/hearing.html
The Hearing Aid Compatibility FCC Order
http://hraunfoss.fcc.gov/edocs_public/attachmatch/FCC-03-168A1.pdf
Hearing Loss Association of America [HLAA]
http://hearingloss.org/content/telephones-and-mobile-devices
Safety
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