Human voice is undoubtedly the cheapest musical instrument in the world : everyone is born with it, and can train and develop it to suit his or her own aesthetic needs. Beyond its communicative functions, the human vocal instrument is capable of producing a wide variety of sounds, and imitating all kinds of other musical instruments.

Advancements in voice assessment enhance diagnosis and clinical accuracy by complementing clinician expertise with objective data, yet many clinicians still rely primarily on subjective methods—not by choice, but because existing tools fail to integrate into workflows that provide practical clinical benefit. Nowhere is this challenge more evident than in hospital

Sex-specific morphological differences in the three main subsystems of the vocal apparatus—namely the respiratory, oscillatory, and resonatory systems—affect both the production and perception of the voice. These differences should be taken into account by anyone concerned with vocal function and health and are therefore here explored.

Chapter three, “Vibratory Vagus Nerve Stimulation” from the recently released book, Sing and Shout for Health, Scientific Insights and Future Directions for Vocology explores the relationship between the vagus nerve, vocalization, vibratory stimulation, and the autonomic nervous system. The chapter provides a comprehensive overview of the vagus nerve, its anatomical relevance, and its role in the