Abstract
The purpose of this study was to investigate the structure and function of larynges of 35 subjects with normal voices. Volunteers aged between 20 and 50 years with no history of voice disorders or laryngeal surgery, no current allergies, no formal voice training, and no hyperactive gag reflex were required to perform various vocal manoeuvres that were carried out under continuous and stroboscopic light. An assessment form was devised to record the condition and function of the larynx. The videotapes of the procedure were rated by experienced judges. The Australian Fiberscopic Profile was devised to record the relevant parameters under continuous light. Videostroboscopic ratings were carried out using the Bless protocol rating. High interjudge agreement was found across the two rating profiles.
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