Aplicación del protocolo de valoración del rango vocal en cantantes populares del Colegio de Música de Medellín, mediante el módulo Real Time Pitch

We present a study that quantified acoustic voice signals over a comfortable and natural glissando to determine maximum and minimum frequencies, the corresponding semitones, the most used frequency, and vocal range before and after warm-up exercises. The assessment was carried out with a protocol for pitch range. Thirty-five singers of popular music in the city of Medellin were evaluated through a survey. Twenty-five persons with no evident laryngeal injuries and no abnormalities on indirect laryngoscopy were identified. The study design was quasi-experimental with pretest and posttest evaluations in a single group and comparison of the results. The application of the protocol and vocal range behavior were evaluated with respect to the variable of warm-up. The results showed quantitatively that vocal range and the quality and comfort of glissando production were increased in 72% of the subjects, according to the values found in the posttest. We conclude that vocal range and maximum and minimum frequencies improved after a warm-up since the means for these frequencies showed improved results. In general we found that the assessment protocol provided by the Real-Time Pitch of the Visi-Pitch IV module notably complemented voice evaluation.