Unlocking the role of the superior temporal gyrus for speech sound
نویسندگان
چکیده
1 categorization. 2 3 4 Mitchell Steinschneider, MD, PhD 5 Department of Neurology 6 Albert Einstein College of Medicine 7 Rose F. Kennedy Center, Room 322 8 1300 Morris Park Avenue 9 Bronx, NY 10461 10 Tel: 718-430-4115 11 Fax: 718: 430-8588 12 e-mail: [email protected] 13 14 The ability to almost effortlessly encode the phonemic content of running speech is a 15 remarkable capacity of the human brain. This remarkable capacity is emphasized by 16 the brain’s maintenance of phonemic stability despite pronounced variability in the 17 spectral and temporal characteristics of a given phoneme and a phoneme’s frequent 18 acoustic overlap with other speech sounds. For instance, vowels map out into discrete 19 regions of acoustic space when the second formant frequency (F2) is plotted against 20 the first formant frequency (F1). However, F2 and F1 values for a given vowel vary 21 widely across speakers, and distributions of F1 versus F2 values for one vowel often 22 overlap significantly with those from others (e.g., /ae/ as in “head” and /ε/ as in “hayed”) 23 Articles in PresS. J Neurophysiol (March 23, 2011). doi:10.1152/jn.00238.2011
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