Auditory feedback is used for adaptive control of timing in speech [post]

Robin Karlin, Benjamin Parrell, Chris Naber
2020 unpublished
Real-time altered auditory feedback has demonstrated a key role for auditory feedback in both online feedback control and in updating feedforward control for future utterances. Much of this research has examined control in the spectral domain, and has found that speakers compensate for perturbations to vowel formants, intensity, and fricative center of gravity. The aim of the current study is to examine adaptation in response to temporal perturbation, using real-time perturbation of ongoing
more » ... ch. Word-initial consonant targets (VOT for /k, g/ and fricative duration for /s, z/) were lengthened and the following stressed vowel (/æ/) was shortened. Overall, speakers did not adapt to lengthened consonants, but did lengthen vowels by nearly 100\% of the perturbation magnitude in response to shortening. Vowel lengthening showed continued aftereffects during a washout phase when perturbation was abruptly removed. Although speakers did not actively adapt consonant durations, the adaptation in vowel duration leads to the consonant taking up an overall smaller proportion of the syllable, aligning with previous research that suggests that speakers attend to proportional durations rather than absolute durations. These results indicate that speakers actively monitor duration and update upcoming plans accordingly.
doi:10.31234/ fatcat:eu2eyl6itzdedjfqo4z3qgry4m