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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
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.
Other Medical Devices
If you use any other personal medical devices, consult the manufacturer of your device to
determine if it is adequately shielded from external RF energy. Your physician may be able
to assist you in obtaining this information. Switch your Jitterbug OFF in health care facilities
when any regulations posted in these areas instruct you to do so. Hospitals or health care
facilities may be using equipment that could be sensitive to external RF energy.
Vehicles
RF signals may affect improperly installed or inadequately shielded electronic systems
in motor vehicles. Check with the manufacturer or its representative regarding your
vehicle. You should also consult the manufacturer of any equipment that has been
added to your vehicle.
Posted facilities
Switch your Jitterbug OFF in any facility where posted notices require you to do so.
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