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Comparison of electroglottographic and acoustic analysis of pitch perturbation.

Authors
  • LaBlance, G R
  • Maves, M D
  • Scialfa, T M
  • Eitnier, C M
  • Steckol, K F
Type
Published Article
Journal
Otolaryngology--head and neck surgery : official journal of American Academy of Otolaryngology-Head and Neck Surgery
Publication Date
Nov 01, 1992
Volume
107
Issue
5
Pages
617–621
Identifiers
PMID: 1437199
Source
Medline
License
Unknown

Abstract

Pitch perturbation is a measure of the cycle-to-cycle variation in vocal fold vibration. Perturbation can be assessed by means of electroglottographic or acoustic signals. The purpose of this study was to determine if these two analysis techniques are equivalent measures. The Laryngograph, an electroglottograph, and the Visi-Pitch, an acoustic analyzer, were used to measure pitch perturbation in 80 dysphonic subjects. Both instruments use Koike's formula to calculate relative average perturbation. While intra-subject variability appeared erratic, statistical analysis of intersubject data indicated that the two instruments provided an equivalent measure of pitch perturbation.

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