Threat vocalisations are acoustically similar between humans (Homo sapiens) and chimpanzees (Pan troglodytes)

TY - JOUR

T1 - Threat vocalisations are acoustically similar between humans (Homo sapiens) and chimpanzees (Pan troglodytes)

AU - Kamiloğlu, Roza G.

AU - Çalışkan, Cantay

AU - Slocombe, Katie E.

AU - Sauter, Disa A.

N1 - © 2023 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.

PY - 2023/8/29

Y1 - 2023/8/29

N2 - In behavioural contexts like fighting, eating, and playing, acoustically distinctive vocalisations are produced across many mammalian species. Such expressions may be conserved in evolution, pointing to the possibility of acoustic regularities in the vocalisations of phylogenetically related species. Here, we test this hypothesis by comparing the degree of acoustic similarity between human and chimpanzee vocalisations produced in 10 similar behavioural contexts. We use two complementary analysis methods: Pairwise acoustic distance measures and acoustic separability metrics based on unsupervised learning algorithms. Cross-context analysis revealed that acoustic features of vocalisations produced when threatening another individual were distinct from other types of vocalisations and highly similar across species. Using a multimethod approach, these findings demonstrate that human vocalisations produced when threatening another person are acoustically similar to chimpanzee vocalisations in the same situation as compared to other types of vocalisations, likely reflecting a phylogenetically ancient vocal signalling system.

AB - In behavioural contexts like fighting, eating, and playing, acoustically distinctive vocalisations are produced across many mammalian species. Such expressions may be conserved in evolution, pointing to the possibility of acoustic regularities in the vocalisations of phylogenetically related species. Here, we test this hypothesis by comparing the degree of acoustic similarity between human and chimpanzee vocalisations produced in 10 similar behavioural contexts. We use two complementary analysis methods: Pairwise acoustic distance measures and acoustic separability metrics based on unsupervised learning algorithms. Cross-context analysis revealed that acoustic features of vocalisations produced when threatening another individual were distinct from other types of vocalisations and highly similar across species. Using a multimethod approach, these findings demonstrate that human vocalisations produced when threatening another person are acoustically similar to chimpanzee vocalisations in the same situation as compared to other types of vocalisations, likely reflecting a phylogenetically ancient vocal signalling system.

KW - Acoustic analysis

KW - behavioural context

KW - distance measures

KW - evolution

KW - unsupervised clustering

KW - vocal expressions

UR - http://www.scopus.com/inward/record.url?scp=85168881397&partnerID=8YFLogxK

U2 - 10.1080/09524622.2023.2250320

DO - 10.1080/09524622.2023.2250320

M3 - Article

AN - SCOPUS:85168881397

SN - 0952-4622

JO - Bioacoustics

JF - Bioacoustics

ER -