A long-range acoustic device (LRAD), acoustic hailing device (AHD), or sound cannon is a specialized loudspeaker and sound weapon that produces sound at high power for communicating at a distance.

LRAD is the global leader and de facto standard of Acoustic Hailing Devices (AHDs). Featuring Genasys’ Advanced Driver and Waveguide Technology, LRAD systems broadcast audible voice …

Mar 17, 2025 · 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.

Jan 29, 2026 · LRAD sound weapons at protests use focused acoustic beams up to 162 decibels that cause permanent hearing damage, but distance and industrial earplugs provide effective protection.

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?

Jan 27, 2026 · Something troopers threatened to use to clear the crowd made a lot of ears perk up. It's called a "long range acoustic device," or LRAD.

Jan 30, 2026 · An LRAD is a highly directional acoustic projector. Unlike a normal loudspeaker that spreads sound in all directions, an LRAD concentrates sound into a narrow beam, typically about …

Mar 21, 2025 · The directional acoustic beam formed by an LRAD (typically 15-30 degrees) employs the same wave physics principles that sound designers use for line array systems in concert venues, but …

Nov 24, 2025 · LRAD, or Long Range Acoustic Device, is a highly directional acoustic hailing and warning system primarily used for long-distance communication and crowd control. It emits focused, …

A Long-Range Acoustic Device, often abbreviated as LRAD, is a piece of technology that produces highly directional sound. It’s a specialized loudspeaker capable of projecting voice commands or …