Echoes of Bats and Men Author:Donald R. Griffin In this book, Griffin describes the process of how scientists learned how bats perform their feats and explains the physics of echolocation. He also includes some of the problems of naval sonar and moves into the potential of using similar techniques to help blind people maneuver. He cites some research into how blind people are able to sense ob... more »stacles and avoid them. His conclusions, based on what occurs when blind people are rendered deaf, are that people are capable of at least some echolocation navigation. « less