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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 ...
An NYPD officer stands ready with the LRAD 500X at an Occupy Wall Street protest on November 17, 2011 near the city hall. Extremely high-power sound waves can disrupt or destroy the eardrums of a target and cause severe pain or disorientation. This is usually sufficient to incapacitate a person.
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 ...
Sound from ultrasound is the name given here to the generation of audible sound from modulated ultrasound without using an active receiver. This happens when the modulated ultrasound passes through a nonlinear medium which acts, intentionally or unintentionally, as a demodulator .
This produces a pressure wave designed to stun the target and knock them off their feet, and electromagnetic radiation that affects nerve cells causing a painful sensation. [citation needed] The pulsed energy projectile is intended for riot control and is said to work over distances of up to 2 km. It weighs about 230 kg and will probably be ...
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MEDUSA (Mob Excess Deterrent Using Silent Audio) is a directed-energy non-lethal weapon designed by WaveBand Corporation in 2003-2004 for temporary personnel incapacitation. [1] The weapon is based on the microwave auditory effect resulting in a strong sound sensation in the human head when it is subject to certain kinds of pulsed/modulated ...
By Dana Liebelson. Published: Wednesday, July 20, 2016, 6:05 PM EDT. On July 13, 2016, we published a database of more than 800 deaths that took place in jails and police lockups in the previous year.