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Background and Aim: Vocal abuse and misuse are the most frequent causes of voice disorders. Consequently some therapy is needed to stop or modify such behaviors. This research was performed to study the effectiveness of vocal hygiene program on perceptual signs of voice in people with dysphonia.
Methods: A Vocal hygiene program was performed to 8 adults with dysphonia for 6 weeks. At first, Consensus Auditory- Perceptual Evaluation of Voice was used to assess perceptual signs. Then the program was delivered, Individuals were followed in second and forth weeks visits. In the last session, perceptual assessment was performed and individuals&apos opinions were collected. Perceptual findings were compared before and after the therapy.
Results: After the program, mean score of perceptual assessment decreased. Mean score of every perceptual sign revealed significant difference before and after the therapy (p≤0.0001). «Loudness» had maximum score and coordination between speech and respiration indicated minimum score. All participants confirmed efficiency of the therapy.
Conclusion: The vocal hygiene program improves all perceptual signs of voice although not equally. This deduction is confirmed by both clinician-based and patient-based assessments. As a result, vocal hygiene program is necessary for a comprehensive voice therapy but is not solely effective to resolve all voice problems.

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Background and Aim: Evaluation of voice problem involves perceptual, acoustic, aerodynamic and physiological measure. In recent years assessment of patients point of view use as a essential part of evaluation. The aim of this study was construct a questionnaire for assessment of physical, functional and emotional voice problems in adults.
Methods: This study is a kind of constructing battery. Based on a comprehensive study of many foreign questionnaires, "The voice symptoms assessment" questionnaire in adult was produced. Its content validity was determined according to the judgment of 7 speech and language pathologists. This questionnaire administered to 60 voice patients (20 female and 40 male) between 18 to 60 years old that could read and write in Persian. The reliability of this questionnaire is determined by the method of Cronbach Alpha and split half.
Results: Content validity index of this questionnaire was 0.94. Cronbach Alpha was high (more than 0.7) and Spearman-Brown coefficient of split half was 0.96. Correlatoin Coefficient was statistically significant between 3 parts and total questionnaire (p<0.01).
Conclusion: "The voice symptoms assessment" questionnaire in adult has good content validity and reliability and reflects the wide range of physical, functional and emotional problems in voice patients. This questionnaire is simple for patients to complete and easy to score. It seems that use of this questionnaire, as part of a complete voice evaluation will be helpful in future.

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Background and Aim: An imbalance between phonatory subsystems may lead to disturbing phonatory muscular balance and consequently voice disorders. Based on theoretical issues, criterion-based laryngeal manual therapy, as a novel treatment method which is supported by classical laryngeal manual therapy, can improve voice quality using manual maneuvers combined with phonatory tasks. The present study aimed to report the treating effects of this method on hyperfunctional voice disorders.

Methods: Twenty adult participants with hyperfunctional voice disorders by the least three months history of voice disorder were selected. The participant’s voices were assessed multidimensionally using acoustic, audio-pecreptual and stroboscopic assessments before and after treatment.

Results: There were a decrease in jitter (p=0.003) and shimmer (p<0.001) and also, increase in harmonic-to-noise ratio (HNR) (p<0.001) of vowel /a/ after treatment. Besides, there was an increase in harmony to noise ratio (p=0.009) and decrease in jitter (p=0.020) of vowel /i/, too. There were not significant changes in shimmer amount of vowel /i/ (p=0.170) after treatment. There were highly significant changes in all aspects of audio-perceptual (p<0.001) and videostroboscopic (p<0.001) parameters.

Conclusion: Using voice-based laryngeal manual therapy can be a treatment method in handling hyperfunctional voice disorders.