The various species of whales inhabiting Earth’s oceans employ different types of vocalizations to communicate.
Sperm whales, the largest of the toothed whales, communicate using bursts of clicking noises — called codas — sounding a bit like Morse code. A new analysis of years of vocalizations by sperm whales in the eastern Caribbean has found that their system of communication is more sophisticated than previously known, exhibiting a complex internal structure replete with a “phonetic alphabet.
The whales, among other things, altered the duration of the codas and sometimes added an extra click at the end, like a suffix in human language. “All of these different codas that we see are actually built by combining a comparatively simple set of smaller pieces,” said study co-author Jacob Andreas, an MIT computer science professor and Project CETI member.
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