These speakers are a product of the Instant Fire Suppression (IFS) program — the same project that came up with the aforementioned magic wand. In the video above, you'll see two DARPA speakers facing each other. Sound coming from the two speakers increases air velocity around the flame, disrupting it and ultimately putting it out.
How DARPA used two huge speakers to instantly suppress fire
Trent Rock
The Convicted Audiophile™
