The goal of this study is to evaluate the efficacy of voice therapy for neurogenic voice disorders. The main questions are: Does voice therapy improve patient-reported quality of life in speakers with neurogenic voice disorders? Does voice therapy improve listener perception of voice in speakers with neurogenic voice disorders? Does voice therapy improve acoustical analyses of voice in speakers with neurogenic voice disorders? Does voice therapy improve physiologic function in speakers with neurogenic voice disorders?
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Patient-reported outcome measures
Timeframe: Participants will complete ratings during the treatment phase at the beginning of the first treatment session and at the end of the last treatment session.
Auditory-perceptual ratings
Timeframe: Listeners will rate samples from all study phases within two years after all data have been collected from all study participants.
Acoustical analyses - extent of modulation
Timeframe: Audio recordings from all study phases will be analyzed within 2 years after completing data collection.
Acoustical analyses - modulation rate
Timeframe: Audio recordings from all study phases will be analyzed within 2 years after completing data collection.
Acoustical analyses - cepstral peak prominence
Timeframe: Audio recordings from all study phases will be analyzed within 2 years after completing data collection.