The vocal score profile/voice range profile ratio (p/p ratio) in artistic voice evaluation: application tested on opera and musical singers

performances of unsuited repertories to singer’s vocal and technical features can cause increasing risks of vocal effort (ve) and fatigue or glottis injury (Gi), then it’s important to find the right repertory for artist’s vocal and technical features. We made manual voice range profiles (vrp) and interviews regarding performed, studied or not studied roles in professional singers. the dynamic agility (da) curve, that is the differentials’ curve (note by note) between loud and soft phonation curves of phonetogram, was obtained from vrp. this type of curve allows us to assess the phonation system capacity all range long. We realised for each operatic and musical role a vocal score profile (vsp), that is a statistic method for vocal score semeiotic and accurately highlights the vocal role various musical features through histograms and numeric parameters (1). then we superimposed the da graphs on vsp graphs creating a new graph (p/p ratio) that gives a synoptic summary of suitableness of examined singers’ vocal and technical features in regard to considered role, revealing hard and critical moments eventually causing higher ve and Gi risks (2). at last we compared data from p/p ratio with those from interviews, valuating correspondence between subjective and objective data (3). this study describes explicative examples of graphs analysis; in all cases analyzed through p/p ratio we found easiness in data interpretation, reliability in suitableness evaluation and expectation, good correspondence between subjective and objective data.