The purpose of the present study was to investigate the responsiveness of the pitch-shift reflex to small magnitude stimuli and voice fundamental frequency level. English speakers received pitch-shifted voice feedback (, 20, 30, 40, and , duration) during vowel phonations at a high and a low level. Mean pitch-shift response magnitude increased as a function of pitch-shift stimulus magnitude, but when expressed as a percent of stimulus magnitude, declined from 100% with to 37% with stimuli. Response magnitudes were larger and latencies were shorter with a high level compared to a low level . Data from the present study demonstrate that vocal response magnitudes are equal to small perturbation magnitudes, and they are larger and faster with a high voice. These results suggest that the audio-vocal system is optimally suited for compensating for small pitch rather than larger perturbations. Data also suggest the sensitivity of the audio-vocal system to voice perturbation may vary with level.
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December 2007
December 01 2007
Effects of perturbation magnitude and voice level on the pitch-shift reflex
Hanjun Liu;
Hanjun Liu
Department of Communication Sciences and Disorders,
Northwestern University
, 2240 Campus Drive, Evanston, Illinois 60208, USA
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Charles R. Larson
Charles R. Larson
a)
Department of Communication Sciences and Disorders,
Northwestern University
, 2240 Campus Drive, Evanston, Illinois 60208, USA
Search for other works by this author on:
a)
Author to whom correspondence should be addressed. Electronic mail: [email protected]
J. Acoust. Soc. Am. 122, 3671–3677 (2007)
Article history
Received:
February 27 2007
Accepted:
September 28 2007
Citation
Hanjun Liu, Charles R. Larson; Effects of perturbation magnitude and voice level on the pitch-shift reflex. J. Acoust. Soc. Am. 1 December 2007; 122 (6): 3671–3677. https://doi.org/10.1121/1.2800254
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