Perceptual auditory aftereffects on voice identity using brief vowel stimuli

Latinus, M. and Belin, P. (2012) Perceptual auditory aftereffects on voice identity using brief vowel stimuli. PLoS ONE, 7(7), e41384. (doi: 10.1371/journal.pone.0041384) (PMID:22844469) (PMCID:PMC3402520)

Abstract

Humans can identify individuals from their voice, suggesting the existence of a perceptual representation of voice identity. We used perceptual aftereffects--shifts in perceived stimulus quality after brief exposure to a repeated adaptor stimulus--to further investigate the representation of voice identity in two experiments. Healthy adult listeners were familiarized with several voices until they reached a recognition criterion. They were then tested on identification tasks that used vowel stimuli generated by morphing between the different identities, presented either in isolation (baseline) or following short exposure to different types of voice adaptors (adaptation). Experiment 1 showed that adaptation to a given voice induced categorization shifts away from that adaptor's identity even when the adaptors consisted of vowels different from the probe stimuli. Moreover, original voices and caricatures resulted in comparable aftereffects, ruling out an explanation of identity aftereffects in terms of adaptation to low-level features. In Experiment 2, we show that adaptors with a disrupted configuration, i.e., altered fundamental frequency or formant frequencies, failed to produce perceptual aftereffects showing the importance of the preserved configuration of these acoustical cues in the representation of voices. These two experiments indicate a high-level, dynamic representation of voice identity based on the combination of several lower-level acoustical features into a specific voice configuration.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Latinus, Dr Marianne and Belin, Professor Pascal
• Authors: Latinus, M., and Belin, P.
• College/School: College of Medical Veterinary and Life Sciences > School of Psychology & Neuroscience
• Journal Name: PLoS ONE
• Publisher: Public Library of Science
• ISSN: 1932-6203
• ISSN (Online): 1932-6203
• Published Online: 23 July 2012
• Copyright Holders: Copyright © 2012 The Authors
• First Published: First published in PLoS ONE 7(7):e41384
• Publisher Policy: Reproduced in accordance with the copyright policy of the publisher