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.

Jun 17, 2020 · During the 2020 protests, police have used an LRAD sonic weapon to disperse protesters. What is it, how does it work, and how can you protect your ears?

Mar 17, 2025 · News stories described the LRAD as a sonic weapon that fired a beam of sound at the pirates and drove them away. More recent news highlights the potential use of LRAD technology in breaking up a peaceful protest in Belgrade, Serbia, in Mar. 2025. But what makes sound a weapon?

4 days ago · Sonic weapons use sound waves to incapacitate, disorient or harm individuals by harnessing acoustic energy, causing both physical and psychological effects, such as dizziness, disorientation or ...

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 · In an address to the nation, Vučić said "it is a vile lie" that a LRAD—commonly known as a sonic weapon—was used, at the mass rally in Belgrade on Saturday. Hundreds of thousands of...

4 days ago · Serbia's populist government is facing increased public scrutiny over reports that it used a sonic weapon against a peaceful crowd during a massive anti-corruption rally in the capital, Belgrade, on March 15. ... (LRAD) – which is illegal in Serbia and many other countries, in Belgrade, Serbia, Wednesday, March 19, 2025. (Serbian Ministry of ...

Mar 20, 2025 · Long-Range Acoustic Device (LRAD): Emits sound up to 160 dB with an 8,900-meter range. Used for crowd control and voice communication in military and police operations.

Dec 10, 2024 · This device falls under sonic and ultrasonic weapons, tools designed to use sound energy for tactical purposes. Sonic weapons emit sound waves—ranging from low (infrasound) to very high (ultrasound) frequencies—to disperse crowds, disorient, or control access to areas.

Acoustic or sonic weapons (also known as long-range acoustic devices, sound cannons, hailing devices, sonic bullets and noise bazookas) are devices that deliver very loud sound over long distances.