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Health and safety information
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.
M3
+
M2
=
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.
42
T3
+
T2
5
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.
Please note that the hearing aid category specified for
this product represents compatibility only using the
=
5
phone configuration in the slider open configuration of
this device, which represents the user configuration of
maximum antenna efficiency.
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