Effectiveness of Vocal Training Techniques in School-Aged Drama Students.

OBJECTIVES: The purpose of this study was to determine whether vocal hygiene education and direct vocal training would impact student self-reported preparedness for using voice for performance. STUDY DESIGN: A single-group, pretest-posttest research design was used. METHODS: Twenty-three drama students in middle and high school participated in a 1-hour vocal training workshop, which included vocal hygiene education and vocal training for performance. Changes in student self-reported preparedness for using voice for performance were examined following participation in the workshop. Data analysis involved comparison of pretest and posttest responses to a novel questionnaire. RESULTS: Participants demonstrated a statistically significant increase in self-reported preparedness for using voice for performance following participation (P < .001, d = 2.40), as measured by mean increase in survey scores. Additionally, significant group differences were found by grade level and report of prior vocal training. CONCLUSIONS: School-aged drama students appear receptive to direct vocal training and vocal hygiene education, with significant gains in self-reported preparedness for using voice for performance observed following intervention.

Impact of Vocal Hygiene Training on Teachers' Willingness to Change Vocal Behaviors.

There is a high incidence of dysphonia reported in teachers, which has been shown to indicate the teacher's ability to instruct as well as students' ability to comprehend. Factors such as extra vocal load, poor classroom acoustics, and health issues may increase a teacher's risk of acquiring a voice disorder that impacts his or her career. A common approach to treating or preventing voice disorders is the use of vocal hygiene training. Many studies have addressed different types of voice training with mixed results due to lengthy training programs, poor implementation, and other factors related to teacher motivation. The purpose of this study was to determine whether education on vocal hygiene practices would impact teachers' willingness to modify vocal behaviors. A group of 26 teachers from preschool to high school was sent pre- and post-training surveys to determine demographics, daily vocal use, and history of voice issues. The survey also assessed participants' likelihood to modify their behaviors to incorporate vocal hygiene practices into their daily lives. Between the pre- and post-training surveys, teachers received a one-hour training on vocal hygiene practices. This training consisted of basic information regarding the anatomy and physiology of the voice, healthy, and unhealthy vocal behaviors and the impact of phonotrauma behaviors, and positive effects of vocal hygiene techniques. Results showed that the impact of vocal hygiene training on teachers' willingness to incorporate vocally hygienic behaviors was statistically significant (d ≥ 0.80). Increases in study participant perceived desire to engage in vocal hygiene behaviors by virtue of vocal hygiene training was manifested in nearly 90% of the targeted vocal hygiene behaviors. In conclusion, teachers appear to benefit from receiving education on voice use and vocal hygiene techniques and show willingness to incorporate these techniques into their repertoires.

Effect of Dysphonia and Cognitive-Perceptual Listener Strategies on Speech Intelligibility.

There is a high prevalence of dysphonia among professional voice users and the impact of the disordered voice on the speaker is well documented. However, there is minimal research on the impact of the disordered voice on the listener. Considering that professional voice users include teachers and air-traffic controllers, among others, it is imperative to determine the impact of a disordered voice on the listener. To address this, the objectives of the current study included: (1) determine whether there are differences in speech intelligibility between individuals with healthy voices and those with dysphonia; (2) understand whether cognitive-perceptual strategies increase speech intelligibility for dysphonic speakers; and (3) determine the relationship between subjective voice quality ratings and speech intelligibility. Sentence stimuli were recorded from 12 speakers with dysphonia and four age- and gender-matched typical, healthy speakers and presented to 129 healthy listeners divided into one of three strategy groups (ie, control, acknowledgement, and listener strategies). Four expert raters also completed a perceptual voice assessment using the Consensus Assessment Perceptual Evaluation of Voice for each speaker. Results indicated that dysphonic voices were significantly less intelligible than healthy voices (P ≤ 0.001) and the use of cognitive-perceptual strategies provided to the listener did not significantly improve speech intelligibility scores (P = 0.602). Using the subjective voice quality ratings, regression analysis found that breathiness was able to predict 41% of the variance associated with number of errors (P = 0.008). Overall results of the study suggest that speakers with dysphonia demonstrate reduced speech intelligibility and that providing the listener with specific strategies may not result in improved intelligibility.