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hearing device°Øs telecoil (°×T Switch°± or
°×Telephone Switch°±) than unrated phones. T4 is
the better/higher of the two ratings. (Note that not all
hearing devices have telecoils in them.)Hearing
devices may also be measured for immunity to this
type of interference. Your hearing device
manufacturer or hearing health professional may
help you find results for your hearing device. The
more immune your hearing aid is, the less likely you
are to experience interference noise from mobile
phones.
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 phone 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.