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TEDTalks (audio)

TED Conferences LLC

Arts, Education, News & Politics, Science & Medicine, Society & Culture, Technology

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Want TED Talks on the go? Every week, this feed brings you our latest talks in audio format. Hear thought-provoking ideas on every subject imaginable – from Artificial Intelligence to Zoology, and everything in between – given by the world's leading thinkers and doers. This collection of talks, given at TED and TEDx conferences around the globe, is also available in video format.

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Daniel Kish: How I use sonar to navigate the world

March 31st, 2015

Episode 238 of 855 episodes

Daniel Kish has been blind since he was 13 months old, but has learned to “see” using a form of echolocation. He clicks his tongue and sends out flashes of sound that bounce off surfaces in the environment and return to him, helping him to construct an understanding of the space around him. In a rousing talk, Kish demonstrates how this works and asks us to let go of our fear of the “dark unknown.”

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