Kumaresan voice pitch index

The Kumaresan Voice Pitch Index is a diagnostic tool developed by Dr. Kumaresan Muthiah and his son, Navin Bharath Kumaresan, to evaluate puberphonia, a disorder where males retain a high-pitched voice after puberty. It uses a combination of objective measurements of vocal frequency and subjective patient assessments of ten voice qualities, such as inaudibility, vocal fatigue, and a "child voice". The index helps monitor the severity and progress of puberphonia before and after treatment, which often involves techniques like pharyngeal resonance manipulation.