A feasibility study to identify the immediate effect on the voices of patients with voice disorders (muscle tension dysphonia, vocal fold palsy or presbylaryngis) produced by exercising with Acapella Choice as a form of semioccluded vocal tract exercise (SOVTE).
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Change in Baseline Cepstral/Spectral Index of Dysphonia (CSID)
Timeframe: Immediately after 3 minutes of exercise