you may take mental picture of what you see , but what about what you hear ? It is potential , using a picture taking trick that can make auditory sensation visible .
It ’s called Schlieren Flow Visualization , and it can be used to watch any change of denseness in the air , including those because of heat . But it ’s an especially nerveless visual when you see it work out with sound .
So , how does it work ? Adam Cole , who runs NPR’sskunkbear tumblr , put togetherthis television explain how combining two mirrors , a light source , a roadblock , and a television camera yields the effectby avert light of its way of life in a means that produces darkening around the change in density . This set - up allow you to in reality see the sounds in the television of everything from someone hand clapping , a firing AK-47 ( GIFed above ) , or even a lit firework ( below ) .
Of course , it ’s not just a cool trick — it ’s also scientifically useful . Epidemiologists , for case , can use also use it to study coughs and , before twist tunnels became usually used , it allowed scientist get a better look at just what was happening with course aviation .
Images via Adam Cole / Skunkbear – NPR .
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