Five male and five female speakers, who were free of any voice disorder, were required to sustain vocal fry phonation at three pitch levels; one an arbitrary Standard level, another lower than the standard, and a third higher. Recordings were made and analyzed of air flow and the acoustic signal of these phonations. This study showed that: 1) the fundamentals of vocal fry were lower than those produced in the modal register; 2) air flow rates were less than found for either modal phonation or falsetto; and 3) there was no correlation between changes in fry frequency and changes in air flow.