Sonic weapon
Videos
Sonic and ultrasonic weapons are directed-energy weapons of various types that use sound to injure or incapacitate an opponent. Some sonic weapons make a focused beam of sound or of ultrasound; others
A long-range acoustic device (LRAD) in use on the USS Blue Ridge
An NYPD officer stands ready with the LRAD 500X at an Occupy Wall Street protest on November 17, 2011 near the city hall.
Long-range acoustic device
Videos
A long-range acoustic device, acoustic hailing device, or sound cannon is a specialized loudspeaker and sound weapon that produces sound at high power for communicating at a distance. It has been used
Sonic weapon
…implicated a newly-installed extractor fan, found by Tandy, that was generating infrasound of 18.9 Hz, 0.3 Hz, and 9 Hz. A long-range acoustic device (LRAD) produces a 30 degree cone of audible sound in frequencies within the human hearing spectrum (20–20,000 Hz). An LRAD was used by the crew of the cruise…
An NYPD LRAD on top of a police humvee outside the 2004 Republican National Convention, hosted in Madison Square Garden in New York City
US Navy Ship with LRAD system aboard, 2010
An LRAD operator wearing hearing protection