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How do bats use ultrasound?



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Bats emit a type of biological sonar which we call echolocation. They let out a loud, high-pitched sound (often above the range of human hearing) which bounces off any obstacles in its way, and then returns to the bat in the form of an echo. These return waves tell the bat how far away the obstacle is as well as its size and shape. These bats have large ears which are very good at understanding the information brought back to them by the echoed waves of sound.