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Amazed the devices that detect enemy aircraft before the radar
Today, thanks to the help of radar systems, it is easy to detect the movement of aircraft. But before radar technology, how do people detect the movement of aircraft?
Sound Locator
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Articles about Sound Locator
3 published items.
Animal world
Evolution of genes in bat ears
New research conducted by the University of Bristol shows that echolocation can evolve more than once in bats.
Scientific application
Aviation reconnaissance before the radar was born
Before radar, how do people detect the appearance of aircraft in the sky, in addition to observing with the naked eye?