William Vennard, was a famous American vocal pedagogist, Vennard introduced contemporary scientific research in the areas of human anatomy and physiology into the study of singing, the shift in approach led to the rejection of many of the beliefs and practices held since the bel canto era, most particularly in the areas of what, which term used for a range of tones in the human voice produced by a particular vibratory pattern of the vocal folds?
William Vennard:  This shift in approach led to the rejection of many of the beliefs and practices held since the bel canto era, most particularly in the areas of vocal registration and vocal resonation. Vocal register: A vocal register is a range of tones in the human voice produced by a particular vibratory pattern of the vocal folds.
i don't know