Noun
LRAD (plural LRADs)
Initialism of long-range acoustic device: an acoustic hailing device used to send messages and warning tones over longer distances or at higher volume than normal loudspeakers.
Days later on November 21 the world watched on in live-streaming horror a raid on the unarmed, peaceful Protectors on the bridge with militarized police using LRAD, tear gas, shooting rubber bullets, and water cannons. Source: Internet