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Acoustic changes in voice after tonsillectomy

H Saida1, H Hirose

  • 1Department of Otolaryngology, Asoka Hospital, Tokyo, Japan.

Acta Oto-Laryngologica. Supplementum
|January 1, 1996
PubMed
Summary
This summary is machine-generated.

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Tonsillectomy widened the posterior pharyngeal space but did not significantly alter Japanese vowel acoustics. Patients likely used auditory feedback to maintain consistent speech sound production post-surgery.

Area of Science:

  • Otolaryngology
  • Speech Science
  • Acoustic Analysis

Background:

  • The vocal tract acts as a resonator, influencing voice characteristics based on its shape.
  • Tonsillectomy, the surgical removal of tonsils, may alter vocal tract dimensions.

Purpose of the Study:

  • To investigate changes in pharyngeal size after tonsillectomy.
  • To analyze the impact of tonsillectomy on the acoustic features of Japanese vowels.

Main Methods:

  • Measurements of anterior and posterior pharyngeal pillar distances in 20 patients weekly post-surgery.
  • Recording and acoustic analysis of five Japanese vowels and conversational sentences.

Main Results:

  • Anterior pillar distance widened at 2 weeks, then narrowed; posterior pillar distance widened up to 4 weeks post-surgery.

Related Experiment Videos

  • No consistent changes in fundamental frequency (F0), F1, or F2 were observed.
  • A slight decrease in F3 was noted, but overall acoustic features of Japanese vowels remained largely unchanged.

    • Conclusions:

    • Tonsillectomy leads to persistent widening of the posterior pharyngeal space.
    • Surgical alteration of the pharynx does not significantly impact Japanese vowel acoustics, suggesting compensatory mechanisms.
    • Auditory feedback is likely crucial for patients to maintain consistent speech sound production after tonsillectomy.