Acoustic cannon' used to fend off Somali pirates

\'Acoustic cannon\' used to fend off Somali pirates
Known as a Long Range Acoustic Device, or LRAD, the non-lethal weapon is capable of cranking out enough decibels of noise to permanently damage hearing and even muck up one's vision. Hundreds of them are being used in Iraq, though cruise ships and commercial vessels are now being outfitted with LRADs to combat pirates.