Both voice techniques and processes can be considered as active ingredients in voice therapy.Ī muscle-tension voice disorder (MTVD) is a commonly occurring dysphonia that results from disorganisation or dysfunction of the laryngeal musculature. Implementation of individual techniques that promote improved voice quality and processes that support learning resulted in improved habitual voice quality. The treatment effects did not depend upon the MTVD type (primary or secondary), treating clinicians, nor the number of sessions and days between sessions.

Effect sizes ranged from 0.237 (post-SVQ) to 0.445 (post-NP) for a smoothed cepstral peak prominence measure. Effect sizes ranged from 0.34 (post-NP) to 0.387 (post-SVQ) for overall severity ratings. Significant overall treatment effects were observed for the treatment program. Active ingredients were evaluated using effect sizes. Mixed-model analysis was performed on auditory–perceptual and acoustic data from voice recordings at baseline and after each technique.

A retrospective review of a clinical voice database was conducted on 68 MTVD patients who were treated using the optimal phonation task (OPT) and sob voice quality (SVQ), as well as two different processes: task variation and negative practice (NP). This study aimed to evaluate the efficacy of active ingredients in the treatment of MTVD. Background: Although voice therapy is the first line treatment for muscle-tension voice disorders (MTVD), no clinical research has investigated the role of specific active ingredients.

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