Three-dimensional phonetographic assessment of voice performance in professional and non-professional speakers

For the assessment of voice performance, three-dimensional (3D) phonetograms were constructed using mean values of vocal pitch, vocal intensity, and phonation time. They were built up for groups of professional and non-professional male and female speakers. The 3D phonetograms of the professional and non-professional groups were projected into one another for the female as well as for the male speakers to facilitate comparison of the professional and non-professional groups. In addition, pitch-related cross-sections of the 3D phonetograms were created. These cross-sections plotted as sequences are useful to evaluate changes in vocal dynamics and phonation time in relation to the course of vocal pitch. In this contribution, it could be demonstrated that the 3D phonetograms of the non-professional groups were completely enclosed by those of the professional groups who developed a greater vocal capacity. Furthermore, the cross-section sequences of the professional groups were obviously longer and broader than those of the non-professional groups. Details of group-specific differences with respect to the examined voice parameters are discussed.