ASA 127th Meeting M.I.T. 1994 June 6-10

4pSP25. Fundamental frequency effects on [voice] judgments in intervocalic stop consonants.

Wendy A. Castleman

Randy L. Diehl

Dept. of Psychol., Univ. of Texas, Austin, TX 78712

Fundamental frequency (F0) has been found to affect judgments of the [+voice]/[-voice] distinction in initial consonants. The present study examined the influence of F0 contour on [voice] judgments of intervocalic consonants. Sixteen /aba/--/apa/ series, each varying in medical closure duration, were synthesized with different F0 contours. Each contour was defined by the F0 value, either 95 or 110 Hz, at four temporal points: First syllable onset, onset of closure, onset of voicing after closure release, and second syllable offset. F0 transitions before or after closure lasted 70 ms. Results showed that both steady-state and transitional portion of the F0 contour influenced [voice] judgments, and that F0 cues in the initial syllable had larger and more reliable effects than those in the final syllable. In general, the lower the F0 value at a given temporal point in the disyllable, the greater the percentage of [+voice] judgments. [Work supported by NIDCD.]