The Long Range Acoustic Device (LRAD) is a long-range hailing and warning device designed to communicate with authority, affect behavior and determine intent. this device from American Technology Corp. provides voice and tone clarity in a 15 to 30-degree beam at distances over 300 meters using only two amps of power. In addition to being a communications tool, intense, directed sound technology, such as the LRAD, can be used to clear buildings when serving search warrants, to control crowds during protests and to patrol ports.
