Wednesday, April 01, 2020
Daniel Kish navigates the world like a bat does"and he does so without ever leaving the ground.
After losing his vision as an infant, Kish taught himself to move around with the help of echolocation. Like bats, Kish uses his mouth to produce a series of short, crisp clicking sounds, and then listens to how those sounds bounce off the surrounding landscape. (Our winged neighbors tend to emit these clicks at frequencies humans can't hear, but Kish's clicks are perfectly audible to human ears.) From there, Kish makes a mental map of his environment, considering everything from broad contours"like walls and doors"down to textural details.
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