force feedback elements are incorporated at various points in a flight helmet . an onboard computer system identifies critical events and translates such events into a force feedback pulse applied to one or more of the force feedback elements , warning the pilot of the critical event while at the same time suppressing more conventional critical event warnings that may distract a pilot . additionally , force feedback elements are incorporated into a vest , bodysuit or body armor . a mobile , personal computer system applies a force feedback pulse to one or more of the force feedback elements to indicate an event that might otherwise require an audible signal .