Discrimination of speaker sex and size when glottal-pulse rate and vocal-tract length are controlled.
A recent study [Smith and Patterson, J. Acoust. Soc. Am. 118, 3177-3186 (2005)] demonstrated that both the glottal-pulse rate (GPR) and the vocal-tract length (VTL) of vowel sounds have a large effect on the perceived sex and age (or size) of a speaker. The vowels for all of the "different" speakers in that study were synthesized from recordings of the sustained vowels of one, adult male speaker. This paper presents a follow-up study in which a range of vowels were synthesized from recordings of four different speakers--an adult man, an adult woman, a young boy, and a young girl--to determine whether the sex and age of the original speaker would have an effect upon listeners' judgments of whether a vowel was spoken by a man, woman, boy, or girl, after they were equated for GPR and VTL. The sustained vowels of the four speakers were scaled to produce the same combinations of GPR and VTL, which covered the entire range normally encountered in every day life. The results show that listeners readily distinguish children from adults based on their sustained vowels but that they struggle to distinguish the sex of the speaker.
Smith
David R R
DR
Centre for Neural Basis of Hearing, Department of Physiology, Development and Neuroscience, University of Cambridge and Department of Psychology, University of Hull, United Kingdom. d.r.smith@hull.ac.uk
Walters
Thomas C
TC
Patterson
Roy D
RD
D000328:Adult; D000367:Age Factors; D000375:Aging / Q000502:physiology*; D001827:Body Height; D002648:Child; D005260:Female; D005931:Glottis / Q000033:anatomy & histology / Q000502:physiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009929:Organ Size; D010700:Phonetics; D011336:Probability; D012737:Sex Factors; D013061:Speech Acoustics; D013067:Speech Perception; D014827:Vocal Cords / Q000033:anatomy & histology / Q000502:physiology*