Chapter 7: Voice Classification
and Life-Span Changes
Equation 7.1. From this formula, we can
see that fundamental frequency is inversely proportional
to the vocal fold length; shorter folds produce higher
frequencies, and longer folds produce lower frequencies.
Also, F0 is proportional to the
square root of the tissue stress.
Equation 7.2. If we take Eq. 7.1 above and
assume that the tissue stress is the same for everyone,
we can derive this equation, which simply restates
that F0 is inversely proportional
to the effective vocal fold length (the part which
actually vibrates). This length is 60% longer for
men than for women.
6 Equations Equations