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    Influence of Left–Right Asymmetries on Voice Quality in Simulated Paramedian Vocal Fold Paralysis

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    Samlan_Story_March_2016_JSLHR.pdf
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    Description:
    Final Accepted Manuscript
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    Author
    Samlan, Robin A.
    Story, Brad H.
    Affiliation
    Univ Arizona, Dept Speech Language & Hearing Sci
    Issue Date
    2017-02-01
    
    Metadata
    Show full item record
    Publisher
    AMER SPEECH-LANGUAGE-HEARING ASSOC
    Citation
    Influence of Left–Right Asymmetries on Voice Quality in Simulated Paramedian Vocal Fold Paralysis 2017, 60 (2):306 Journal of Speech Language and Hearing Research
    Journal
    Journal of Speech Language and Hearing Research
    Rights
    Copyright © 2017, American Speech-Language-Hearing Association.
    Collection Information
    This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
    Abstract
    Purpose: The purpose of this study was to determine the vocal fold structural and vibratory symmetries that are important to vocal function and voice quality in a simulated paramedian vocal fold paralysis. Method: A computational kinematic speech production model was used to simulate an exemplar "voice" on the basis of asymmetric settings of parameters controlling glottal configuration. These parameters were then altered individually to determine their effect on maximum flow declination rate, spectral slope, cepstral peak prominence, harmonics-to-noise ratio, and perceived voice quality. Results: Asymmetry of each of the 5 vocal fold parameters influenced vocal function and voice quality; measured change was greatest for adduction and bulging. Increasing the symmetry of all parameters improved voice, and the best voice occurred with overcorrection of adduction, followed by bulging, nodal point ratio, starting phase, and amplitude of vibration. Conclusions: Although vocal process adduction and edge bulging asymmetries are most influential in voice quality for simulated vocal fold motion impairment, amplitude of vibration and starting phase asymmetries are also perceptually important. These findings are consistent with the current surgical approach to vocal fold motion impairment, where goals include medializing the vocal process and straightening concave edges. The results also explain many of the residual postoperative voice limitations.
    ISSN
    1092-4388
    PubMed ID
    28199505
    DOI
    10.1044/2016_JSLHR-S-16-0076
    Version
    Final published version
    Additional Links
    http://jslhr.pubs.asha.org/article.aspx?doi=10.1044/2016_JSLHR-S-16-0076
    ae974a485f413a2113503eed53cd6c53
    10.1044/2016_JSLHR-S-16-0076
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    UA Faculty Publications

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