title: Comparison of aerodynamic and electroglottographic parameters in evaluating clinically relevant voicing patterns.
abstract: The purpose of the present study was to identify one or more aerodynamic or electroglottographic measures that distinguish among voicing patterns that are clinically relevant for nodule pathogenesis and regression: a presumably pathogenic pattern (pressed voice), a neutral pattern (normal voice), and two presumably therapeutic patterns (resonant voice and breathy voice). Trained subjects with normal voices produced several tokens of each voice type on sustained vowels /a/, /i/, and /u/. For each token, maximum flow declination rate, alternating current flow, and minimum flow were obtained from inverse-filtered airflow signals, and closed quotient and closing time were obtained from electroglottographic signals. The results indicate that for /a/ and /i/ (but not for /u/), the closed quotient provides a sensitive tool for distinguishing the voice types in physiologically interpretable directions. Further, post-hoc analyses confirmed a direct relationship between the closed quotient and videoscopic ratings of laryngeal adduction, which previous work links to nodule pathogenesis and regression.
authors.affiliation: Department of Otolaryngology-Head and Neck Surgery, University of Iowa, Iowa City.
authors.forename: K L
authors.initials: KL
authors.lastname: Peterson
authors.forename: K
authors.initials: K
authors.lastname: Verdolini-Marston
authors.forename: J M
authors.initials: JM
authors.lastname: Barkmeier
authors.forename: H T
authors.initials: HT
authors.lastname: Hoffman
mesh_terms: D000328:Adult; D000388:Air; D003201:Computers; D005260:Female; D005931:Glottis / Q000502:physiology*; D006801:Humans; D008297:Male; D010699:Phonation / Q000502:physiology; D014743:Videotape Recording; D014827:Vocal Cords / Q000502:physiology*; D014831:Voice / Q000502:physiology*; D014832:Voice Disorders / Q000175:diagnosis / Q000628:therapy; D014833:Voice Quality; D014834:Voice Training