CAN YOU EX­TIN­GUISH A BUSH FIRE WITH SOUND WAVES?

World of Knowledge (Australia) - - Question & Answers -

It can take up to ten min­utes for the fire ser­vice to reach the lo­ca­tion of an alarm. Dur­ing that time a fly­ing saucer called Fire­sound might have al­ready done the hard work – with­out us­ing any wa­ter. The me­tre-wide hy­dro­gen-pow­ered drone is used to mon­i­tor forests. If it comes across a fire that has just bro­ken out, the air­craft emits deep sound waves. These waves cre­ate air cur­rents which weaken the small fire. It’s not only the tem­per­a­ture that is re­duced – it ef­fec­tively moves the air just enough to starve a fire of oxy­gen. Fire de­part­ments are now look­ing at the drone as a po­ten­tial ‘eye in the sky’ be­cause its ther­mal cam­eras can help fire chiefs de­cide the best place to de­ploy fire­fight­ers dur­ing for­est fires.

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