Gibbons effortlessly use the same techniques as professional opera singers when calling out to other animals, scientists found by listening to the squeaky songs of one of the apes on helium.
The Japanese study provides evidence for an unusual physiological similarity between gibbons and humans.
"The complexity of human speech is unique among primates as it requires varied soft sounds made by the rapid movements of vocal tracts," lead researcher Takeshi Nishimura, from the Primate Research Institute at Kyoto University, said in a statement. "Our speech was thought to have evolved through specific modifications in our vocal anatomy. However, we've shown how the gibbons' distinctive song uses the same vocal mechanics as soprano singers, revealing a fundamental similarity with humans."
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