Koalas’ very deep voice

An unexpected extra set of vocal cords lets males hit some surprisingly low notes

By Beth Mole, 17:03 PM December 3, 2013

Scientists have just turned up a second set of vocal cords in koalas. These bonus vocal cords allows males to hit tones 20 times lower than would be expected from an animal its size.

The size of an animal’s voice box and its flapping vocal cords dictate the range of pitches that an animal can make. For a typical 8-kilogram (17.5-pound) male koala, its voice should fall within the near-soprano range of any animal choir. Yet the male’s mating songs include very low bellows — tones usually create...

Source URL: https://student.societyforscience.org/article/koalas-deep-voice-unexpected-extra-set-vocal-cords-low-notes?mode=blog&context=90