This video from “BBC Earth” discusses the sonar-like, “echolocation”, abilities which dolphins use to locate the world around them. Sam, a young blind boy, is learning to use the same ability to help him navigate his own world.
Milo the Dolphin uses Sonar to locate the world around him. Incredible school boy Sam is learning how to tap into this skill and become an echolocator.
The BBC has this fascinating video: