: One of the most famous contributions of the book is the detailed exploration of the "pharyngeal voice." Herbert-Caesari describes this as a "peculiar" mechanism, historically used by tenors of the Rossini and Bellini eras, which acts as a bridge between the modal (chest) and falsetto registers.
Understanding The Voice of the Mind by Edgar F. Herbert-Caesari
: The training focuses on sending the correct mental signals to the vocal machinery so that physical actions eventually become "second nature".
: The book includes contributions from acoustician Noel Bonavia-Hunt , who provides scientific context for the sensations described.