Abstract

Terrestrial mammals use vocal communication to mediate crucial interactions such as sexual competition, territorial maintenance, social recognition, and coordination of defense against predators. Recent research supported by theoretical and technological advances has greatly enhanced our understandings of mammal vocal communication. In particular, the application of source-filter theory (originally developed as a framework for interpreting human speech sounds) to the analysis of digitized nonhuman mammal vocalizations has revealed important complexity in these signals that relates to their information content. Here we outline how this complexity can code information that is vital in social and sexual behavior.

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