Electrophysiological Evidence of Early Cortical Sensitivity to Human Conspecific Mimic Voice as a Distinct Category of Natural Sound

Autor/inn/en	Talkington, William J.; Donai, Jeremy; Kadner, Alexandra S.; Layne, Molly L.; Forino, Andrew; Wen, Sijin; Gao, Si; Gray, Margeaux M.; Ashraf, Alexandria J.; Valencia, Gabriela N.; Smith, Brandon D.; Khoo, Stephanie K.; Gray, Stephen J.; Lass, Norman; Brefczynski-Lewis, Julie A.; Engdahl, Susannah; Graham, David; Frum, Chris A.; Lewis, James W.
Titel	Electrophysiological Evidence of Early Cortical Sensitivity to Human Conspecific Mimic Voice as a Distinct Category of Natural Sound
Quelle	In: Journal of Speech, Language, and Hearing Research, 63 (2020) 10, S.3539-3559 (21 Seiten) PDF als Volltext Verfügbarkeit
Zusatzinformation	ORCID (Lewis, James W.)
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	1092-4388
Schlagwörter	Imitation; Acoustics; Auditory Discrimination; Reaction Time; Animals; Adults + Suchen Sie Ihr Suchwort? Akustik; Reaktionsvermögen; Animal; Tier; Tiere
Abstract	Purpose: From an anthropological perspective of hominin communication, the human auditory system likely evolved to enable special sensitivity to sounds produced by the vocal tracts of human conspecifics whether attended or passively heard. While numerous electrophysiological studies have used stereotypical human-produced verbal (speech voice and singing voice) and nonverbal vocalizations to identify human voice-sensitive responses, controversy remains as to when (and where) processing of acoustic signal attributes characteristic of "human voiceness" per se initiate in the brain. Method: To explore this, we used animal vocalizations and human-mimicked versions of those calls ("mimic voice") to examine late auditory evoked potential responses in humans. Results: Here, we revealed an N1b component (96-120 ms poststimulus) during a nonattending listening condition showing significantly greater magnitude in response to mimics, beginning as early as primary auditory cortices, preceding the time window reported in previous studies that revealed species-specific vocalization processing initiating in the range of 147-219 ms. During a sound discrimination task, a P600 (500-700 ms poststimulus) component showed specificity for accurate discrimination of human mimic voice. Distinct acoustic signal attributes and features of the stimuli were used in a classifier model, which could distinguish most human from animal voice comparably to behavioral data--though none of these single features could adequately distinguish human voiceness. Conclusions: These results provide novel ideas for algorithms used in neuromimetic hearing aids, as well as direct electrophysiological support for a neurocognitive model of natural sound processing that informs both neurodevelopmental and anthropological models regarding the establishment of auditory communication systems in humans. (As Provided).
Anmerkungen	American Speech-Language-Hearing Association. 2200 Research Blvd #250, Rockville, MD 20850. Tel: 301-296-5700; Fax: 301-296-8580; e-mail: slhr@asha.org; Web site: http://jslhr.pubs.asha.org
Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2024/1/01