How humans echolocate 'like bats'
Media playback is unsupported on your deviceA study has revealed secrets that help some blind people navigate their world by "seeing with sound". People who use "echolocation" employ it in a very similar way to bats - producing clicks that bounce off objects and "sonify" them into a picture of the surroundings. A study of experts in the technique has revealed how louder clicks allow "echolocators" to see behind them. The insights are published in the Royal Society journal Proceedings B. The key finding was that - just like bats - expert echolocators instinctively increase the intensity (or loudness) of their clicks, and click more frequently when an object is off to the side or behind them. "Everyone's clicks are different," explained Daniel Kish, a co-author on this study, who is also a b...