Efficacy of Long-Term Intensive Straw Phonation Exercise in Air for Hyperfunctional Voice Disorders: A Preliminary Study.

Purpose: Literature highlights the efficacy of prolonged use of straw phonation for vocally healthy individuals. Nevertheless, minimal studies have examined the prolonged use of single treatment in hyperfunctional voice disorders (HFVD), as straw phonation is used as physiological training to improve voice quality in these individuals. The present study aimed to investigate the long-term intensive training effect of straw phonation exercise in air (SPEA) for HFVD.

Method: In a time series design, seven females with HFVD (mean age 42.28years) participated in SPEA for 12 long sessions (30 minutes/session) intensively trained for 3weeks (4days/week). The participant-recorded voice samples were analyzed for aerodynamic measures Aerodynamic Subglottic Pressure (ASP), Airflow Rate (AFR), glottal behavior measures Contact Quotient (CQ), Contact Quotient Range (CQR), acoustic measure Acoustic Voice Quality Index (AVQI), auditory-perceptual Consensus Auditory Perceptual Evaluation of Voice - Kannada (CAPE-V-K), and self-perceptual measure Voice Handicap Index - Kannada (VHI-K) at pre-therapy, mid-therapy, post therapy, and 1-month follow-up timelines. Related Friedman's two-way analysis of variance and post hoc Wilcoxon signed-rank test were used to analyze the change in outcome measures across therapy timelines.

Results: Significant reduction in ASP, CQR, AVQI, CAPE-V-K, and VHI-K measures from pre-therapy to post-therapy and follow-up timelines was observed. Although there was a decrease in AFR and CQ measures from pre therapy to post therapy and follow-up, no significant differences were observed. No significant changes were observed from pre therapy to mid-therapy in any outcome measures, indicating the need for extended therapy duration and regular practice.

Conclusion: These findings provide preliminary evidence of implementing the long-term intensive training of SPEA for HFVD with the support of significant outcome measures at various therapy timelines.