Section I: Technical advances in the study of primate vocal signals. - Some analysis methods that may be useful to acoustic primatologists. - Artificial neural networks for analysis and recognition of primate vocal communication. - Section II: Social and ecological determinants of vocal communication. - Loud calls in nocturnal prosimians: Structure evolution and ontogeny. - Vocal ontogeny in macaques and marmosets: Convergent and divergent line of development. - Vocal ontogeny of the squirrel monkey Saimiri boliviensis peruviensis. - Temporal and acoustic flexibility in vocal exchanges of coo calls in Japanese monkeys (Macaca fuscata). - The vocal behavior of Barbary macaques (Macaca sylvanus): Call features and their performance in infants and adults. - Loud calls in Great Apes: Sex differences and social correlates. - Section III: Morphological and neuronal substrates for vocal communication. - A comparative approach to the non-human primate vocal tract: Implications for sound production. - Neuronal control of vocal production in non-human and human primates. - Role of auditory cortex in the perception of vocalizations by Japanese macaques. - Amplitude envelope encoding as a feature for temporal information processing in the auditory cortex of squirrel monkeys. - Section IV: Cognitive and evolutionary aspects. - Representational signaling in non-human primate vocal communication. - Linguistic capacity: An ontogenetic theory with evolutionary implications. - What primate calls can tell us about human evolution. Language: English