Title: Does the production of speech necessarily rely on auditory feedback?
Abstract:Talkers show sensitivity to a range of perturbations of auditory feedback (e.g., manipulation of vocal amplitude, fundamental frequency, formant frequency). When the auditory concomitants of speech (f...Talkers show sensitivity to a range of perturbations of auditory feedback (e.g., manipulation of vocal amplitude, fundamental frequency, formant frequency). When the auditory concomitants of speech (feedback) are perturbed, talkers compensate in order to preserve accurate productions. These effects demonstrate the role of sensory feedback in articulatory control and have been used to study the role of prediction in motor planning. In this study, 15 subjects spoke a monosyllable (‘head’) and the formants in their utterances were shifted in real time using a custom signal processing system and were fed back over headphones with an imperceptible delay. The first and second formants were altered so that the auditory feedback matched the subjects’ productions of ‘had’. Despite explicit instruction to ignore the feedback changes and maintain consistent production of ‘head’, subjects produced a robust compensation similar to the compensatory behavior shown by naive subjects. In general, subjects altered their vowel formant values in a direction opposite to the perturbation, as if to cancel its effects. These results suggest that compensation in the face of formant perturbation is automatic and obligatory. Results will be discussed in terms of the representations that guide speech motor control. Work supported by NIDCD and NSERC.Read More
Publication Year: 2007
Publication Date: 2007-05-01
Language: en
Type: article
Indexed In: ['crossref']
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