ERIC Number: EJ1280535
Record Type: Journal
Publication Date: 2020-Sep
Pages: 15
Abstractor: As Provided
ISBN: N/A
ISSN: ISSN-1092-4388
EISSN: N/A
Auditory-Motor Perturbations of Voice Fundamental Frequency: Feedback Delay and Amplification
Journal of Speech, Language, and Hearing Research, v63 n9 p2846-2860 Sep 2020
Purpose: Gradual and sudden perturbations of vocal fundamental frequency (f[subscript o]), also known as adaptive and reflexive f[subscript o] perturbations, are techniques to study the influence of auditory feedback on voice f[subscript o] control mechanisms. Previous vocal f[subscript o] perturbations have incorporated varied setup-specific feedback delays and amplifications. Here, we investigated the effects of feedback delays (10--100 ms) and amplifications on both adaptive and reflexive f[subscript o] perturbation paradigms, encapsulating the variability in equipment-specific delays (3--45 ms) and amplifications utilized in previous experiments. Method: Responses to adaptive and reflexive f[subscript o] perturbations were recorded in 24 typical speakers for four delay conditions (10, 40, 70, and 100 ms) or three amplification conditions (-10, +5, and +10 dB relative to microphone) in a counterbalanced order. Repeated-measures analyses of variance were carried out on the magnitude of f[subscript o] responses to determine the effect of feedback condition. Results: There was a statistically significant effect of the level of auditory feedback amplification on the response magnitude during adaptive f[subscript o] perturbations, driven by the difference between +10- and -10-dB amplification conditions (hold phase difference: M = 38.3 cents, SD = 51.2 cents; after-effect phase: M = 66.1 cents, SD = 84.6 cents). No other statistically significant effects of condition were found for either paradigm. Conclusions: Experimental equipment delays below 100 ms in behavioral paradigms do not affect the results of f[subscript o] perturbation paradigms. As there is no statistically significant difference between the response magnitudes elicited by +5- and +10-dB auditory amplification conditions, this study is a confirmation that an auditory feedback amplification of +5 dB relative to microphone is sufficient to elicit robust compensatory responses for f[subscript o] perturbation paradigms.
Descriptors: Acoustics, Articulation (Speech), Auditory Stimuli, Young Adults, Auditory Perception, Feedback (Response)
American Speech-Language-Hearing Association. 2200 Research Blvd #250, Rockville, MD 20850. Tel: 301-296-5700; Fax: 301-296-8580; e-mail: slhr@asha.org; Web site: http://jslhr.pubs.asha.org
Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: National Institute on Deafness and Other Communication Disorders (NIDCD)
Authoring Institution: N/A
Grant or Contract Numbers: P50DC015446; T32DC013017; R01DC016270