- The LRAD, which stands for Long Range Acoustic Device, projects sound in a 30-degree cone. It's capable of being heard with significant clarity a kilometer away from the speaker.
"We're able to broadcast over a great distance. It's clearly understood. there's no miscommunication. It's more effective than using a bullhorn," said Sergeant Chris Bielfeldt, Chicago Police.
The Chicago Police Department has purchased two LRAD units at $20,000 a piece. Their inaugural use may come NATO weekend as a means of delivering clear messages to crowds. There are 13 recorded messages which are meant to give fair warning to police directives, and an LRAD operator can also give live specific orders.
The LRAD can also emit high pitched alarm tones, which are not fun for the ear.
Of course, echoing all over downtown, we're sure that the Department is supplying all of us with appropriate ear protection. Common sense right?