Effects of pitch-shift velocity on voice F0 responses

Charles R. Larson · Theresa A. Burnett · Swathi Kiran · Timothy Carl Hain

148 citations0/0 files storedThe Journal of the Acoustical Society of America

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Phonetics and Phonology Research Motor Control and Adaptation Voice and Speech Disorders

Abstract

Previous studies have shown that voice fundamental frequency (F0) is modified by changes in the pitch of vocal feedback and have demonstrated that the audio-vocal control system has both open- and closed-loop control properties. However, the extent to which this system operates in closed-loop fashion may have been underestimated in previous work. Because the step-type stimuli used were very rapid, and people are physically unable to change their voice F0 as rapidly as the stimuli, feedback responses might have been reduced or suppressed. In the present study, pitch-shift stimuli, consisting of a disparity between voice F0 and feedback pitch of varying ramp onset velocities, were presented to subjects vocalizing a steady /ah/ sound to examine the effect of stimulus onset on voice F0 responses. Results showed that response velocity covaried with stimulus velocity. Response latency and time of the peak response decreased with increases in stimulus velocity, while response magnitude decreased. A simple feedback model reproduced most features of these responses. These results strongly support previous suggestions that the audio-vocal system monitors auditory feedback and, through closed-loop negative feedback, adjusts voice F0 so as to cancel low-level fluctuations in F0.

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References

1998Voice F0 responses to manipulations in pitch feedback 1997Voice F0 responses to pitch-shifted auditory feedback: a preliminary study

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2002The role of auditory feedback during phonation: studies of Mandarin tone production 2002Effects of frequency-shifted auditory feedback on voice F0 contours in syllables 2001Comparison of voice F0 responses to pitch-shift onset and offset conditions 2007Effects of simultaneous perturbations of voice pitch and loudness feedback on voice F and amplitude control 2010Adaptive auditory feedback control of the production of formant trajectories in the Mandarin triphthong /iau/ and its pattern of generalization 2013ERP correlates of the magnitude of pitch errors detected in the human voice 2003Audio-vocal responses to repetitive pitch-shift stimulation during a sustained vocalization: Improvements in methodology for the pitch-shifting technique 2010Prosodic Adaptations to Pitch Perturbation in Running Speech

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