We came across this interesting story about an echolocation method called “Flash Sonar,” which essentially uses the subtle – yet seemingly effective – technique of tongue clicking to create sounds that in turn help blind and visually impaired people interpret their surroundings, and remarkably even at high speeds.
The process is the brain child of Daniel Kish, founder of World Access for the Blind, who devised it as a way to allow those with limited or even without sight to navigate the world through sound.