Video: Darpa's 'Wall-of-Sound' Fire Extinguisher
...Even better, the sound does not even need to be offensively loud to achieve any of this.
Video: Darpa's 'Wall-of-Sound' Fire Extinguisher | Danger Room | Wired.com
(note: Some 'related' stories at the bottom of the article regarding sonic warfare and crowd suppression may also be of interest to some of you)
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:)