Navigating the world as a blind person sometimes involves using a cane, guide dog or wearable GPS system. For some, this toolkit includes echolocation. Producing tongue clicks and listening for echoes can be enough to gain information about nearby objects.
But even for expert echolocators, a single click is rarely enough to perceive an object. Echo after echo incrementally improves understanding, especially for expert echolocators, researchers report April 6 in eNeuro. The finding helps explain how the brain processes sound more generally.
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