150Section 13Hearing AidsSome digital wireless phones may interfere with somehearing aids. In the event of such interference, you maywish to consult your hearing aid manufacturer to discussalternatives.Other Medical DevicesIf you use any other personal medical devices, consult themanufacturer of your device to determine if it isadequately shielded from external RF energy. Yourphysician may be able to assist you in obtaining thisinformation. Switch your phone off in health care facilitieswhen any regulations posted in these areas instruct you todo so. Hospitals or health care facilities may be usingequipment that could be sensitive to external RF energy.VehiclesRF signals may affect improperly installed orinadequately shielded electronic systems in motorvehicles. Check with the manufacturer or itsrepresentative regarding your vehicle. You should alsoconsult the manufacturer of any equipment that has beenadded to your vehicle.Posted FacilitiesSwitch your phone off in any facility where posted noticesrequire you to do so.Potentially Explosive EnvironmentsSwitch your phone off when in any area with a potentiallyexplosive atmosphere and obey all signs and instructions.