A new study finds that horse whinnies are made of both a high and a low frequency, generated by different parts of the vocal tract. The two-tone sound may help horses convey more complex information.

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An equine makes the low-pitched part of its whinny by vibrating its vocal cords—similar to how humans speak and sing—and the high-pitched part by whistling ...

The distinctive sound horses produce when they whinny is created by combining low and high pitch sounds together, like grunting and whistling at the same time ...

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A horse’s whinny is an iconic sound, arguably on par with a cow’s moo and a sheep’s baa and a donkey’s hee-haw. Most people can immediately recognize a horse’s signature sound, so it might come as a ...