You can put out a blaze with annihilation added than sound—and it doesn't even accept to be eardrum-deadening, Marty McFly-flattening loud sound. This is Darpa's sonic blaze extinguisher, and it sounds kinda like a foghorn.
The extinguisher was developer to action fires in baby spaces, like even cockpits or address holds. It uses speakers on either ancillary of a aqueous ammunition flame. (It's not bright the decibel akin or abundance of complete required.) Here's how Active explains the demonstration:
The aggregation abiding two speakers either ancillary of a aqueous ammunition blaze to authenticate how blaze can be controlled by amping up an acoustic field. The complete increases air velocity, which again thins the breadth of the blaze breadth agitation occurs, accepted as the blaze boundary. Once the abuttals breadth is thinned, the blaze is easier to extinguish. At the aforementioned time, the acoustics are advancing the basin of ammunition and creating college ammunition vaporisation - this widens the flame, abrasion it out so it is beneath concentrated and air-conditioned abundant to extinguish.
Pretty awesome. Here's searching advanced to the day your beleaguer complete arrangement doubles as your blaze extinguisher. [Wired]
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