Relation of Structural and Vibratory Kinematics of the Vocal Folds to Two Acoustic Measures of Breathy Voice Based on Computational Modeling PurposeTo relate vocal fold structure and kinematics to 2 acoustic measures: cepstral peak prominence (CPP) and the amplitude of the first harmonic relative to the second (H1–H2).MethodThe authors used a computational, kinematic model of the medial surfaces of the vocal folds to specify features of vocal fold structure and vibration ... Article
Article  |   October 01, 2011
Relation of Structural and Vibratory Kinematics of the Vocal Folds to Two Acoustic Measures of Breathy Voice Based on Computational Modeling
 
Author Affiliations & Notes
  • Brad H. Story
    Speech Acoustics Laboratory, University of Arizona, Tucson
  • Correspondence to Robin A. Samlan: rsamlan@email.arizona.edu
  • Editor: Anne Smith
    Editor: Anne Smith×
  • Associate Editor: Jack Jiang
    Associate Editor: Jack Jiang×
Article Information
Speech, Voice & Prosody / Speech
Article   |   October 01, 2011
Relation of Structural and Vibratory Kinematics of the Vocal Folds to Two Acoustic Measures of Breathy Voice Based on Computational Modeling
Journal of Speech, Language, and Hearing Research, October 2011, Vol. 54, 1267-1283. doi:10.1044/1092-4388(2011/10-0195)
History: Received July 13, 2010 , Accepted January 28, 2011
 
Journal of Speech, Language, and Hearing Research, October 2011, Vol. 54, 1267-1283. doi:10.1044/1092-4388(2011/10-0195)
History: Received July 13, 2010; Accepted January 28, 2011
Web of Science® Times Cited: 13

PurposeTo relate vocal fold structure and kinematics to 2 acoustic measures: cepstral peak prominence (CPP) and the amplitude of the first harmonic relative to the second (H1–H2).

MethodThe authors used a computational, kinematic model of the medial surfaces of the vocal folds to specify features of vocal fold structure and vibration in a manner consistent with breathy voice. Four model parameters were altered: degree of vocal fold adduction, surface bulging, vibratory nodal point, and supraglottal constriction. CPP and H1–H2 were measured from simulated glottal area, glottal flow, and acoustic waveforms and were related to the underlying vocal fold kinematics.

ResultsCPP decreased with increased separation of the vocal processes, whereas the nodal point location had little effect. H1–H2 increased as a function of separation of the vocal processes in the range of 1.0 mm to 1.5 mm and decreased with separation > 1.5 mm.

ConclusionsCPP is generally a function of vocal process separation. H1*–H2* (see paragraph 6 of article text for an explanation of the asterisks) will increase or decrease with vocal process separation on the basis of vocal fold shape, pivot point for the rotational mode, and supraglottal vocal tract shape, limiting its utility as an indicator of breathy voice. Future work will relate the perception of breathiness to vocal fold kinematics and acoustic measures.

Acknowledgments
This research was supported by National Institute on Deafness and Other Communication Disorders Grant R01-DC04789.
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