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.

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 2025, military and police forces make some limited use of sonic weapons.

Mar 17, 2025 · What makes sound a weapon? Review the basics of sound and discover exactly how the LRAD produces its "beam of sound." We'll also explore LRAD's hailing and warning abilities and other uses for sound.

6 days ago · It was "a subdued sound lasting only 2-3 seconds but very unusual and very frightening, like a sound from hell," she said. Ilic Sunderic was not alone in describing the panic.

Jun 17, 2020 · What appears to be a projector, a box amplifier, or a loudspeaker mounted on a police car or strapped to an officer’s chest is a relatively modern military-grade deterrent that creates powerful...

6 days ago · BELGRADE, Serbia (AP) — Ivana Ilic Sunderic had never heard anything quite so alarming and disturbing at a protest as the sound that broke a commemorative silence during a huge anti-government rally in Serbia’s capital, Belgrade. “It was quiet and peaceful and then we heard something we could not see … like a sound rolling toward us, a whiz,” Ilic Sunderic said about the March 15 ...

6 days ago · News; World news; Serbia; Illegal 'sound from hell' sonic weapon may have been used to shut down Belgrade protest A peaceful anti-corruption in Belgrade on March 15 turned into a 'frightening ...

6 days ago · BELGRADE, Serbia (AP) — Ivana Ilic Sunderic had never heard anything quite so alarming and disturbing at a protest as the sound that broke a commemorative silence during a huge anti-government rally in Serbia's capital, Belgrade. “It was quiet and peaceful and then we heard something we could not see … like a sound rolling toward us, a whiz,” Ilic Sunderic said about the March 15 incident.

Acoustic weapons, also known as long-range acoustic devices and sound cannons, are devices that deliver very loud sounds over long distances. This technology is used for crowd-control purposes by emitting loud and painful levels of noise that may lead to significant harms to the ears, potentially causing hearing loss.

Mar 10, 2021 · What happens when you get hit with a “sound cannon?” The Long-Range Acoustic Device, or LRAD, was developed for the military for long-range communication at sea. But this ear-splitting device has also been fired on protesters across America, resulting in lawsuits and permanent hearing loss.