Issue N# 5 - 2003
Efficacy of voice therapy assessed with the voice range profile (Phonetogram)
Authors : P. H. DeJonckere, I. van Wijck, R. Speyer (Utrecht)
Ref. : Rev Laryngol Otol Rhinol. 2003;124,5:285-289.
Article published in english
Downloadable PDF document english
Introduction: Voice Range Profile (VRP), or Phonetography, is a widely used method of acoustic voice assessment: it explores and documents the extreme possibilities or capabilities of the voice by producing a chart displaying the intensity dynamics as a function of the fundamental frequency range. Objectives: In the present study VRP is used for investigating the efficacy of (isolated) functional voice therapy, and for defining the best suited VRP criteria for this purpose. Material and method: 30 adult voice patients with complaints of chronic dysphonia (> 4 months) fitted the acceptance - and exclusion criteria, and received functional voice therapy for 2 sessions/ week during 3–6 months therapy (2 x / week). VRP was performed before and after therapy, and a follow-up VRP was conducted 3 months after completion of the therapy. Results: The parameters “softest intensity” and “VRP – area” seem the most sensitive parameters: they show an average highly significant improvement after therapy, and still an average significant improvement between the end of treatment and the follow-up measurement. Conclusion: For daily practice, an index (3 points-index) combining Fo-range and softest intensity is proposed.
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