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Safety
112
hearing aid with the particular
wireless phone. “Normausage”
in this context is defined as a
signaquality that’s acceptable for
norma 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
NationaStandards Institute (ANSI)
C63.19 standard.
To ensure that the Hearing Aid
Compatibility rating for your
phone is maintained, secondary
transmitters such as Bluetooth
components must be disabled
during a call.