title: Vocal fundamental and formant frequencies are honest signals of threat potential in peripubertal males.
abstract: Fundamental and formant frequencies influence perceived pitch and are sexually dimorphic in humans. The information content of these acoustic parameters can illuminate the forces of sexual selection shaping vocal sex differences as well as the mechanisms that ensure signal reliability. We use multiple regression to examine the relationships between somatic (height, adiposity, and strength) and acoustic (fundamental frequency [F0], formant position [Pf], and fundamental frequency variation [F0-SD]) characteristics in a sample of peripubertal Bolivian Tsimane. Results indicate that among males-but not females-strength is the strongest predictor ofF0andPfand thatF0andPfare independent predictors of strength when height and adiposity are controlled. These findings suggest that listeners may attend to vocal frequencies because they signal honest, nonredundant information about male strength and threat potential, which are strongly related to physical maturity and which cannot be ascertained from visual or other indicators of height or adiposity alone.
authors.affiliation: Department of Anthropology, University of California , Santa Barbara, CA 93106 , USA and.
authors.forename: Carolyn R
authors.initials: CR
authors.lastname: Hodges-Simeon
authors.affiliation: Department of Anthropology, University of California , Santa Barbara, CA 93106 , USA and.
authors.forename: Michael
authors.initials: M
authors.lastname: Gurven
authors.affiliation: Department of Anthropology, Pennsylvania State University , 218 Carpenter Building, University Park, PA 16802 , USA.
authors.forename: David A
authors.initials: DA
authors.lastname: Puts
authors.affiliation: Department of Anthropology, University of California , Santa Barbara, CA 93106 , USA and.
authors.forename: Steven J C
authors.initials: SJ
authors.lastname: Gaulin
keywords: costly signaling; formants; fundamental frequency; pitch; voice.