The goal of this phase 2 clinical trial is to examine the effectiveness of photobiomodulation in patients with vocal fatigue. The main question it aims to answer is whether photobiomodulation is able to alleviate vocal fatigue in patients with diagnosed vocal fatigue. Participants will ask to receive photobiomodulation treatment for 12 sessions over a three week period.
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Vocal Fatigue Measure: Vocal Fatigue Index (VFI-HK)
Timeframe: This will be measured at baseline (pre-treatment) and within 2-weeks after the completion of treatment (post-treatment).