Secret underwater messages can be hidden in whale dolphin chatter
Secret underwater messages could be camouflaged as the clicks whistles of whale or dolphin calls, fooling eavesdroppers by making them believe they are hearing marine animals.
Marine mammal sounds can affect military sonar systems, so they are usually deemed ocean noise filtered out. This makes these animal signals a stealthy solution for communicating secretly underwater.
To test the idea, Chunyue Li her colleagues at Tianjin University in China designed a method …