title: High-speed imaging and electroglottography measurements of the open quotient in untrained male voices' register transitions.
abstract: Vocal fold oscillation patterns in vocal register transitions are still unclarified. The vocal fold oscillations and the open quotient were analyzed with high-speed digital imaging (HSDI) and electroglottography (EGG) in 18 male untrained subjects singing a glissando from modal to the falsetto register. Results reveal that the open quotient changed with register in both HSDI and EGG. The in-class correlations for different HSDI and EGG determinations of the open quotient were high. However, we found only weak interclass correlations between both methods. In 10 subjects, irregularities of vocal fold vibration occurred during the register transition. Our results confirm previous observations that falsetto register is associated with a higher open quotient compared with modal register. These data suggest furthermore that irregularities typically observed in audio and electroglottographic signals during register transitions are caused by irregularities in vocal fold vibration.
authors.affiliation: Department of Musicians' Medicine, Freiburg University Medical Center, Freiburg, Germany. matthias.echternach@uniklinik-freiburg.de
authors.forename: Matthias
authors.initials: M
authors.lastname: Echternach
authors.forename: Sebastian
authors.initials: S
authors.lastname: Dippold
authors.forename: Johan
authors.initials: J
authors.lastname: Sundberg
authors.forename: Susan
authors.initials: S
authors.lastname: Arndt
authors.forename: Mark F
authors.initials: MF
authors.lastname: Zander
authors.forename: Bernhard
authors.initials: B
authors.lastname: Richter
mesh_terms: D000328:Adult; D001696:Biomechanical Phenomena; D005931:Glottis / Q000033:anatomy & histology / Q000502:physiology*; D006801:Humans; D007091:Image Processing, Computer-Assisted; D007734:Kymography; D007828:Laryngoscopy; D008297:Male; D009146:Music; D009991:Oscillometry; D010699:Phonation; D011446:Prospective Studies; D013018:Sound Spectrography; D013061:Speech Acoustics; D014732:Vibration; D014741:Video Recording; D014833:Voice Quality; D055815:Young Adult