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Non-stationary Altered Auditory Feedback Effects on Speech Production| old_uid | 11543 |
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| title | Non-stationary Altered Auditory Feedback Effects on Speech Production |
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| start_date | 2012/06/21 |
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| schedule | 13h30 |
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| online | no |
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| location_info | Ampère, salle B314 |
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| summary | In this talk, I introduce my research group and present our current research on non-stationary altered auditory feedback effects on speech production. Auditory feedback is significantly linked to the speech production in the motor planning and acquisition.
Altered auditory feedback like pitch-shifted speech or formants shifted speech has been widely used for investigating the linkage
between speech perception and production, Most of previous studies focus mainly on the compensatory response
to the stationary auditory feedback perturbation. In this talk, we focus on speech compensation in response to the non-stationary altered auditory feedback.
The auditory feedback speech was altered in real time so that the time-scale is locally modified in the transition
between phonemes by using TD-PSOLA method. We examined speech compensation to time-scaled auditory
feedback speech, where the time-scale modification was applied in the transition of the vowel,-semi-vowel-vowel sequence /iya/.
Speech compensation was acoustically analyzed in terms of the first two formant frequencies and their velocity patterns.
The time course of speech compensation was also examined to investigate the adaptation speed to the altered speech dynamics and the after effect in the return trials followed by the perturbation trials.
The adaptation speed was not so fast and the speech compensation almost saturated after several perturbation trials.
We discuss whether the speech compensation occurs by detecting the spectral change or the phonemic change. |
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| responsibles | Lœvenbruck, Welby |
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