Deviant vocal fold vibration as observed during videokymography: the effect on voice quality

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Videokymographic images of deviant or irregular vocal fold vibration, including diplophonia, the transition from falsetto to modal voice, irregular vibration onset and offset, and phonation following partial laryngectomy were compared with the synchronously recorded acoustic speech signals. A clear relation was shown between videokymographic image sequences and acoustic speech signals, and the effect of irregular or incomplete vocal fold vibration patterns was recognized in the amount of perceived breathiness and roughness and by the harmonics-to-noise ratio in the speech signal. Mechanisms causing roughness are the presence of mucus, phase differences between the left and right vocal fold, and short-term frequency and amplitude modulation. It can be concluded that the use of simultaneously recorded videokymographic image sequences and speech signals contributes to the understanding of the effect of irregular vocal fold vibration on voice quality.

Original languageEnglish
Pages (from-to)313-22
Number of pages10
JournalJournal of voice
Issue number3
Publication statusPublished - Sept 2001


  • Acoustical analysis
  • Aged
  • Aged, 80 and over
  • Case Reports
  • High-speed imaging
  • Humans
  • Journal Article
  • Laryngoscopy
  • Male
  • Middle Aged
  • Perceptual evaluation
  • Sound Spectrography
  • Speech Acoustics
  • Stroboscopy
  • Vibration
  • Videokymography
  • Videotape Recording
  • Vocal Cords
  • Vocal fold vibration
  • Voice Disorders
  • Voice Quality

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