BEIJING - Dolphins do not whistle as previously thought. Instead, they "talk" like humans, according to a new study.
Dolphins use their noses to produce a different kind of tonal sound, just like humans do when speaking [particularly evident in Tonal Asian languages like Thai and Chinese], said Peter Madsen, the lead author of the study published in Royal Society Biology Letters.
Madsen studied how dolphins communicate by digitizing recordings made in 1977 of a 12-year-old male dolphin, which was made to breathe a mixture of helium and oxygen called heliox.
Scientists said humans breathing in a heliox sound like Donald Duck. According to Livescience.com, the heliox was meant to mimic conditions during a deep dive since it causes a shift up in frequency. However, when breathing in heliox, the dolphin continued to make the same sounds with the same frequency. More
Enslaved, trained dolphin takes part in an aquatic football match to entertain tourists at the Hefei Aquarium in Hefei, capital of east China's Anhui Province in 2010 (Xinhua).
Wisdom Quarterly (COMMENTARY)
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