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Floating ball voice therapy (FBVT) improved vocal efficiency and quality of life in patients with nonphonotraumatic vocal hyperfunction (NPVH). Early practice variability in FBVT predicted patient generalization to connected speech.

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Area of Science:

  • Speech and Hearing Sciences
  • Voice Disorders
  • Rehabilitation Technology

Background:

  • Nonphonotraumatic vocal hyperfunction (NPVH) presents a challenge in voice therapy.
  • Evidence-based therapies often target improved vocal efficiency through modified resonance and airflow.
  • Floating ball voice therapy (FBVT) is a novel virtual environment designed to facilitate these therapeutic targets.

Purpose of the Study:

  • To preliminarily assess the effects of FBVT on voice therapy outcomes.
  • To explore the potential of FBVT's novel variability metrics in predicting individual patient generalization.
  • To evaluate FBVT's efficacy in improving vocal efficiency and reducing symptoms of NPVH.

Main Methods:

  • Ten patients diagnosed with NPVH participated in 10 days of FBVT practice.
  • Outcomes were measured using vocal efficiency ratio, NPVH index, Voice-Related Quality of Life (V-RQOL) scores, and auditory judgments of severity.
  • Early practice (Day 1) variability (airflow and intensity) was analyzed in relation to the vocal efficiency ratio error.
  • Generalization to spontaneous speech was assessed using the NPVH index.

Main Results:

  • A short dosage of FBVT (10 sessions) led to significant improvements in vocal efficiency (Cohen's d = 1.3).
  • Patients showed reduced NPVH index scores (d = -1.1) and improved V-RQOL (d = 0.9).
  • FBVT also improved overall voice severity (odds ratio = 2.5).
  • Early variability metrics on Day 1 predicted generalization to connected speech by Day 10 (d = 0.6-1.2).

Conclusions:

  • FBVT demonstrates potential as an effective voice therapy tool, showing significant positive outcomes with a minimal practice duration.
  • Novel variability metrics within FBVT show promise for predicting treatment generalization.
  • Further research with larger cohorts is warranted to confirm these findings and further characterize vocal exploration quality.