Project CETI seeks to understand the communication patters in sperm whales. Using machine learning, MIT CSAIL and Project CETI researchers revealed complex, language-like structure in sperm whale communication.
...the research shows that sperm whales codas, or short bursts of clicks that they use to communicate, vary significantly in structure depending on the conversational context, revealing a communication system far more intricate than previously understood.
Nine thousand codas, collected from Eastern Caribbean sperm whale families observed by the Dominica Sperm Whale Project, proved an instrumental starting point in uncovering the creatures’ complex communication system. Alongside the data gold mine, the team used a mix of algorithms for pattern recognition and classification, as well as on-body recording equipment. It turned out that sperm whale communications were indeed not random or simplistic, but rather structured in a complex, combinatorial manner.
The researchers identified something of a “sperm whale phonetic alphabet,” where various elements that researchers call “rhythm,” “tempo,” “rubato,” and “ornamentation” interplay to form a vast array of distinguishable codas. For example, the whales would systematically modulate certain aspects of their codas based on the conversational context, such as smoothly varying the duration of the calls — rubato — or adding extra ornamental clicks. But even more remarkably, they found that the basic building blocks of these codas could be combined in a combinatorial fashion, allowing the whales to construct a vast repertoire of distinct vocalizations.
For those not familiar with the language of science fiction, first contact refers to the initial encounter with a non-human race. The phrase first occurs in Proxima Centauri, a 1935 story by Murray Leinster.
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