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2. Long-range acoustic device - Wikipedia

   en.wikipedia.org/wiki/Long-range_acoustic_device

   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 meter ...

3. Directed-energy weapon - Wikipedia

   en.wikipedia.org/wiki/Directed-energy_weapon

   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.

4. Genasys - Wikipedia

   en.wikipedia.org/wiki/Genasys

   Genasys Inc. is based in San Diego, California.Its long-range acoustic device (LRAD) products are used for long-range acoustic hailing and mass notification. Its software-as-a-service product suite, the Genasys Protect Platform, that includes ACOUSTICS, ALERT, CONNECT (formerly Evertel), and EVAC (formerly Zonehaven), is used for emergency alerting, notifications, evacuations, secure ...

5. Sonic weapon - Wikipedia

   en.wikipedia.org/wiki/Sonic_weapon

   A long-range acoustic device (LRAD) in use on the USS Blue Ridge. Sonic and ultrasonic weapons (USW) are 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 produce an area field of sound. As of 2023 military and police forces make some limited ...

6. Sonar - Wikipedia

   en.wikipedia.org/wiki/Sonar

   Sonar (sound navigation and ranging or sonic navigation and ranging) [ 2 ] is a technique that uses sound propagation (usually underwater, as in submarine navigation) to navigate, measure distances (ranging), communicate with or detect objects on or under the surface of the water, such as other vessels. [ 3 ]

7. Active Denial System - Wikipedia

   en.wikipedia.org/wiki/Active_Denial_System

   In September 2020 it was revealed that federal officials had explored the use of the device and the Long Range Acoustic Device to disperse civilians protesting outside the White House in June of that year, but had been advised that the National Guard was not currently in possession of either device. [35] [36]