Crank Up the Volume

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Forget blasting out your favorite tunes, you could now use speakers to put out a fire. A new video from the US Defense Advanced Research Projects Agency (DARPA) shows how to extinguish burning fuel by trapping it in an acoustic field generated by surrounding speakers.

By using specific frequencies, a fire is killed in a two-pronged attack. First, sound increases the air speed, thinning the layer where combustion occurs and thus making it easier to disrupt the flame. But the acoustics also disturb the surface of the fuel which increases vaporization, widening the flame and cooling its overall temperature.

Whereas typical firefighting techniques disrupt chemical reactions involved in combustion, DARPA has been looking at approaches like this one that exploit physics. Previously, they’ve used an electric field to blow out a flame by creating an ionic wind. They hope to develop these alternatives to help put out fires in military environments, for example in confined spaces, like cockpits and ship holds.

Attribution: New Scientist

About the Common Constitutionalist

Brent, aka The Common Constitutionalist, is a Constitutional Conservative, and advocates for first principles, founders original intent and enemy of progressives. He is former Navy, Martial Arts expert. As well as publisher of the Common Constitutionalist blog, he also is a contributing writer for Political Outcast, Godfather Politics, Minute Men News (Liberty Alliance), Freedom Outpost, the Daily Caller, Vision To America and Free Republic. He also writes an exclusive weekly column for World Net Daily (WND).

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