In our increasingly wireless world, the air is full of electromagnetic signals carrying data from one place to another. While these new technologies advance our options in security, commerce and entertainment, they also produce potential interference that may cause concern for people with implanted medical devices. One source of potential interference is the electronic article surveillance (EAS) systems that help retailers, libraries and other establishments prevent theft and track inventory. Also, early signs suggest potential concerns from the radio-frequency identification (RFID) systems that are now coming into more widespread use.
