Daniel Boone, a University of Arizona professor and expert on vocal mechanisms, providers the answer: 'Fundamental frequency or voice pitch level is directly related to the length and thickness of the individual's vocal folds [or vocal cords]'.
The average man's vocal-fold length is approximately 18mm; the average women's is 10 mm. The tall person of either gender is likely to have longer vocal cords than a shorter person of same sex.
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