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?

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.

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?

Mar 26, 2025 · The weapons, which are illegal in Serbia, emit sound waves which can trigger sharp ear pain, disorientation, eardrum ruptures or even irreversible hearing damage. ... (LRAD), which is illegal in ...

Acoustic weapons are indiscriminate, causing harm or pain to protesters, bystanders, and law enforcement, despite the narrow beam in which sound is concentrated. Abuse or lack of operator knowledge about the health effects can easily lead to incorrect use …

Sep 10, 2023 · Sonic weapons known as Long Range Acoustic Devices (LRAD), are used by law enforcement officials as a non-traditional method of crowd control and dispersal in multiple countries...

Mar 20, 2025 · This article discusses the use of non-lethal weapons, specifically the sound cannon or directional speaker technology, in the aftermath of the controversial events surrounding the peaceful protest in Belgrade on March 15, 2025.

Feb 20, 2022 · At vaccine mandate protests in Canberra last week, police used powerful loud-hailing devices called Long-Range Acoustic Devices (LRADs) to address protesters. While some protesters...

The LRAD (Long Range Acoustic Device) brand: The LRAD has a range of 8,900 meters for intelligible speech and a maximum output of 12 decibels at one meter. It can cause pain at 20 meters and permanent hearing loss at close range (5 meters or less).