Acoustic (ultrasonic) non-lethal weapons like the Long Range Acoustic Device (LRAD) are well known due to their use by law enforcement to disperse protests, or on oceangoing ships to deter ...

LRAD by Genasys is the global leader and de facto standard of Acoustic Hailing Devices. Featuring Genasys’ Advanced Driver and Waveguide technology, LRAD systems broadcast audible voice messages ...