Using Sonar to Navigate the World
From: Wireless Design & Development - 04/01/2015

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."

View the TED Talk (13:03) at:
http://www.wirelessdesignmag.com/videos/2015/04/using-sonar-navigate-world

Link:
Daniel Kish
http://www.ted.com/speakers/daniel_kish

Related:
You May Go Blind ... but Your Brain Doesn't!
http://www.mdtmag.com/blogs/2015/04/you-may-go-blindbut-your-brain-doesnt

Enhancing Your Perception through a Vest
http://www.mdtmag.com/blogs/2015/03/enhancing-your-perception-through-vest