Voice quality change in future professional voice users after 9 months of voice training

Bernadette Timmermans, Marc De Bodt, Floris Wuyts, Paul Van de Heyning
European Archives of Oto-rhino-laryngology 2004, 261 (1): 1-5
Sixty-eight students of a school for audiovisual communication participated in this study. A part of them, 49 students, received voice training for 9 months (the trained group); 19 subjects received no specific voice training (the untrained group). A multidimensional test battery containing the GRBAS scale, videolaryngostroboscopy, Maximum Phonation Time (MPT), jitter, lowest intensity (IL), highest frequency (FoH), Dysphonia Severity Index (DSI) and Voice Handicap Index (VHI) was applied before and after training to evaluate training outcome. The voice training is made up of technical workshops in small groups (five to eight subjects) and vocal coaching in the ateliers. In the technical workshops, basic skills are trained (posture, breathing technique, articulation and diction), and in the ateliers, the speech and language pathologist assists the subjects in the practice of their voice work. This study revealed a significant amelioration over time for the objective measurements [Dysphonia Severity Index: from 2.3 to 4.5 ( P<0.001)] and the self-evaluation [Voice Handicap Index, from 23 to 18.4 ( P=0.016)] for the trained group only. This outcome favors the systematic introduction of voice training during the schooling of professional voice users.

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