KILL BACKGROUND NOISE Jawbone ICON is equipped with military-grade Noise Assassin 2.5 with wind reduction, the best noise cancellation technology that money can buy. Originally developed for use by tank commanders and helicopter pilots, NoiseAssassin is a proprietary technology that eliminates unwanted background noise when you talk on the phone. It gives you the freedom to enjoy quiet phone conversations in places you previously couldn't. Jawbone headsets are the only Bluetooth headsets with a Voice Activity Sensor (VAS) that literally feels your speech vibrations. As a result, Jawbone ICON delivers unmatched speech quality and eliminates virtually all background noise.