Resumen de Dolphin sonar inspires coin-sized bomb detector
Dolphin clicks have inspired the development of a cheap, coin-sized radar gadget that can sense hidden electronics. The device could be used to find covert surveillance bugs, bomb triggers or timers--even if they are hidden in large piles of clutter or garbage. While watching a nature show, acoustics engineer Timothy Leighton of the University of Southampton UK wondered why dolphins blow clouds of bubbles from their blowholes to corral fish. By experimenting with different forms of acoustic signals, he found that a large pulse followed by a small one could reflect sound waves in such a way as to allow fish and bubbles to be easily distinguished.
