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Multidimensional voice program analysis in profoundly deaf children: quantifying frequency and amplitude control.

Paolo Campisi1, Aaron J Low, Blake C Papsin

  • 1Centre for Paediatric Voice and Laryngeal Function, Department of Otolaryngology-Head and Neck Surgery, Hospital for Sick Children, Toronto, Canada. paolo.campisi@sickkids.ca

Perceptual and Motor Skills
|October 14, 2006
PubMed
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Profoundly deaf children show normal voice pitch and loudness but struggle with vocal control. Objective voice analysis revealed significant issues in frequency and amplitude variation during sustained phonation.

Area of Science:

  • Pediatric Otolaryngology
  • Speech Science
  • Auditory Neuroscience

Background:

  • Profound hearing loss significantly impacts speech development.
  • Objective voice analysis provides quantifiable data on vocal production.
  • Understanding vocal control in deaf children is crucial for intervention.

Purpose of the Study:

  • To objectively characterize the vocal profiles of profoundly deaf children.
  • To identify acoustic correlates of auditory deprivation in voice production.
  • To explore the relationship between auditory deprivation and phonation stability.

Main Methods:

  • Acoustic analysis of sustained /a/ phonation in 21 profoundly deaf children (ages 3.5-18).
  • Measurement of fundamental frequency (F0), jitter, shimmer, vF0, vAM, and formant frequencies (F1, F2, F3).

Related Experiment Videos

  • Comparison of acoustic variables against normative data for hearing children.

    • Main Results:

    • Mean F0, jitter, and shimmer were within normal limits.
    • Statistically significant elevations in fundamental frequency variation (vF0) and peak amplitude variation (vAM) were observed.
    • Formant frequencies (F1, F2, F3) were comparable to normal-hearing children, with one exception.

    Conclusions:

    • Auditory deprivation leads to impaired long-term control of frequency and amplitude during sustained phonation.
    • Elevated vF0 and vAM suggest difficulties in maintaining vocal stability.
    • Phonation instability may indicate a compromised internal model of voice and speech in deaf individuals.