The crew of a cruise ship attacked by pirates off the coast of Somalia used a sonic weapon to help ward off the attackers […]
The device blasts earsplitting noise in a directed beam.
The sonic device, known as a Long Range Acoustic Device, or LRAD, is a so-called “non-lethal weapon” developed for the military after the 2000 attack on the USS Cole in Yemen as a way to keep operators of small boats from approaching U.S. warships.
That article has a picture of the pirates shot by a passenger. I guess “pirate” is code for “idiot in a shrimp boat with a crappy gun.”