New study finds dolphins produce sounds in a similar way to humans

(PhysOrg.com) -- It has long been thought that dolphins produce sounds by means of "whistles," but a new analysis of a data gathered in the late 1970s has revealed that instead, dolphins make sounds by means of tissue vibrations, in a similar way to the way humans and other mammals use vocal cords (also known as vocal folds) and birds use the syrinx.

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