The Comparison of the Acoustic and Aerodynamic Characteristics of $PROVOX^{(R)}$ Voice and Esophageal Voice Produced by the Same Laryngectomee

동일 후적자가 산출하는 기관식도 발성($PROVOX^{(R)}$ 발성)과 식도 발성에 대한 음향학적 및 공기역학적 특성 비교

  • 표화영 (연세대학교 의과대학 이비인후과교실 음성언어의학연구소) ;
  • 최홍식 (연세대학교 의과대학 이비인후과교실 음성언어의학연구소) ;
  • 임성은 (연세대학교 의과대학 이비인후과교실 음성언어의학연구소) ;
  • 최성희 (연세대학교 의과대학 이비인후과교실 음성언어의학연구소)
  • Published : 1999.04.01

Abstract

Our experimental subject was a laryngectomee who had undergone total laryngectomy with $PROVOX^{(R)}$ insertion, and learned esophageal speech after the surgery, so he could produce both $PROVOX^{(R)}$ voice and esophageal voice. With this subject's production of $PROVOX^{(R)}$ and esophageal voice, we are to compare the acoustic and aerodynamic characteristics of the two voices, under the same physical conditions of the same person. As a result, the fundamental frequency of esophageal voice was 137.2 Hz, and that of $PROVOX^{(R)}$ was 97.5 Hz. $PROVOX^{(R)}$ voice showed lower jitter, shimmer and NHR than esophageal voice, which means that $PROVOX^{(R)}$ voice showed better voice quality than esophageal voice. In spectrographic analysis, the formation of formants and pseudoformants were more distinct in esophageal voice and several temporal aspects of acoutic features such as VOT and closure duration were more similar with normal voice in $PROVOX^{(R)}$ voice. During the sentence utterance, esophageal voice showed longer pause or silence duration than $PROVOX^{(R)}$ voice. Maximum phonation time and mean flow rate of $PROVOX^{(R)}$ voice were much longer and larger than esophageal voice, but mean and range of sound pressure level, subglottic pressure and voice efficiency were similar in the two voices. Glottal resistance of esophageal voice was much larger than $PROVOX^{(R)}$ voice which showed still larger glottal resistance than normal voice.

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