Seven-year-old blind boy ‘uses echoes to see’

By Chris Irvine © The Telegraph, U.K. — Lucas Murray, a seven-year-old blind boy, is thought to be the first in Britain to use echoes to visualise his surroundings. Lucas, who was born blind, clicks his tongue on the roof of his mouth and uses the sound to gauge where objects are based on how they bounce back. By clicking, he can work out how far away an object is by the time it takes the echo to return. The intensity of the echo tells him the object’s size while the pitch tells him if a moving object is getting nearer or further away. He was taught the technique called echolocation, similar to sonar used by bats, by Daniel Kish, a blind Californian who founded the World Access for the Blind charity…. READ ARTICLE

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