Abstract
The duration of voice onset time (VOT), using a pause adjustment device, was systematically altered for English stops. For voiceless stops VOT was reduced to half the distance between the voiced and voiceless cognates, VOT was made equivalent to the voiced cognate, and the vocalic portion preceded the release and aspiration segments by 20 ms. Changes in VOT for the voiced stops involved the inversion of the first two measurements described above. In general, our findings did not indicate that changes in VOT duration for stop-vowel syllables altered appreciably the perception of voicing. Further, in a subsequent experiment when only the burst + the first 10, 20 or 30 ms of aspiration were presented to listeners, the stops were identified as voiceless. The conclusions drawn from these experiments are that aspiration is the primary perceptual cue in the detection of voicing, and that VOT operates as a relatively unimportant secondary cue.
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