Aerodynamically and acoustically driven modes of vibration in a physical model of the vocal folds

Zhaoyan Zhang, Juergen Neubauer, David A. Berry

Research output: Contribution to journalArticle

52 Scopus citations

Abstract

In a single-layered, isotropic, physical model of the vocal folds, distinct phonation types were identified based on the medial surface dynamics of the vocal fold. For acoustically driven phonation, a single, in-phase, x -10 like eigenmode captured the essential dynamics, and coupled with one of the acoustic resonances of the subglottal tract. Thus, the fundamental frequency appeared to be determined primarily by a subglottal acoustic resonance. In contrast, aerodynamically driven phonation did not naturally appear in the single-layered model, but was facilitated by the introduction of a vertical constraint. For this phonation type, fundamental frequency was relatively independent of the acoustic resonances, and two eigenmodes were required to capture the essential dynamics of the vocal fold, including an out-of-phase x -11 like eigenmode and an in-phase x -10 like eigenmode, as described in earlier theoretical work. The two eigenmodes entrained to the same frequency, and were decoupled from subglottal acoustic resonances. With this independence from the acoustic resonances, vocal fold dynamics appeared to be determined primarily by near-field, fluid-structure interactions.

Original languageEnglish (US)
Pages (from-to)2841-2849
Number of pages9
JournalJournal of the Acoustical Society of America
Volume120
Issue number5
DOIs
StatePublished - Oct 31 2006

ASJC Scopus subject areas

  • Arts and Humanities (miscellaneous)
  • Acoustics and Ultrasonics

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