大象如何通过次声波进行远距离交流
In the savannas of Africa and the forests of Asia, elephants are known for their trumpeting calls. Yet a deeper, quieter conversation is constantly happening below the range of human hearing. These gentle giants use infrasound—sound waves lower than 20 hertz—to communicate across distances of several kilometers, a discovery that reshaped our understanding of animal social life.
Scientists first confirmed this ability in the 1980s when they noticed elephants flapping their ears or freezing in unison, even when no audible call was made. Special microphones revealed that elephants produce rumbles with frequencies as low as 5 hertz, undetectable to us. These sounds travel through ground and air, allowing herds to coordinate movements, warn of predators, or reunite after separation.
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