sonic cannon

When a powerful "sonic cannon" was not "effective" in repelling Somali pirates during a high-seas showdown Wednesday, armed guards successfully battled off the marauders the good old-fashioned way -- with firearms, said Vice Adm. William Gortney, who commands the Pacific region for the U.S. Navy....

Pittsburgh police on Thursday used an audio cannon manufactured by American Technology Corporation (ATCO), a San Diego-based company, to disperse protesters outside the G-20 Summit -- the first time its LRAD series device has been used on civilians in the U.S. An ATC sales representative confirms...