Dolphins are able to make a large range of different sounds using a special part of their anatomy called nasal air sacs.

Such air sacs are located just behind their blowhole.

Three different kinds of sound have been identified.

– The whistles, which are modulated in frequency and used usually for communication.

– The burst-pulsed sounds used also for communication.

– The clicks, which are used for echolocation. A burst of clicks is called a click train.


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