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A long-range acoustic device (LRAD), acoustic hailing device (AHD) or sound cannon is a specialized loudspeaker that produces sound at high power for communicating at a distance. It has been used as a method of crowd control , which has caused permanent hearing damage , having an extremely high decibel capacity (up to 160 dB measured at one ...
A long-range acoustic device produces a 30 degree cone of audible sound in frequencies within the human hearing spectrum (20 - 20000 Hz). An LRAD was used by the crew of the cruise ship Seabourn Spirit in 2005 to deter pirates who chased and attacked the ship. [ 3 ]
Modern sonic weapons such the Long Range Acoustic Device (LRAD) rely on multiple loudspeaker drivers for increased sound power, and may array them in a flat plane rather than on a parabolic surface. Such weapons do not use parabolic reflectors which necessarily limit the number of drivers—a large area of drivers aimed at the reflector would ...
Guns: Oto Melara 76mm Super Rapid gun (mounted in stealth cupola), 4 × STK 50MG 12.7 mm (0.50 in) HMG, 2 × 25mm Mk 38 Mod2 Typhoon Weapon Station Stabilised Gun; Non-lethal: Long-Range Acoustic Device 500 Xtreme (LRAD500X) Aircraft carried: 1 × S-70B Seahawk multi-mission capable naval helicopter: Aviation facilities
The Long Range Acoustic Device (LRAD) is an acoustic hailing device developed by Genasys (formerly LRAD Corporation) to send messages and warning tones over longer distances or at higher volume than normal loudspeakers, and as a non-lethal directed-acoustic-energy weapon. LRAD systems are used for long-range communications in a variety of ...
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Chicago–Gary Defense Area (C): Site (C-98) Fort Sheridan hosted the headquarters of the Fifth Army Air Defense Command. Other regional command facilities were located at the Museum of Science and Industry , site (C-51) Orland Park , and site (C-80) Arlington Heights.
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