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The LRAD was developed after the 2000 attack on the "USS Cole," a U.S. In Pittsburgh, police used the LRAD to warn protesters to evacuate the city streets surrounding the summit site. The LRAD can also be used to transmit spoken messages across long distances.
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city of Pittsburgh, Pennsylvania, used the device to repel antiglobalization demonstrators protesting the G20 summit in 2009.Ī video from the event shows protesters covering their ears and backing away as the truck-mounted LRAD, which resembles a satellite dish, emits a high-pitched noise, similar to a car alarm.
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The LRAD first made headlines when police in the U.S. This is the LRAD, or Long Range Acoustic Device, which can emit a 150-decibel beam of sound and has become increasingly popular as a crowd-control device in the United States and around the world. Its effects have been likened to standing in front of a jet engine - a blast of amplified sound capable of inducing headaches, panic, and potential hearing loss.
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