Glottal airflow characteristics of women's voice production along an aging continuum.

Anatomical and physiological changes of the speech production mechanism that occur with aging may result in phonatory distinctions between older and younger speakers. This investigation examined amplitude-based glottal airflow characteristics from sustained vowel production in healthy adult women. Sixty women participated in this study, 10 each in six age groups of 20-, 30-, 40-, 50-, 60-, and 70-year-olds. Measures included peak, alternating, and minimum glottal airflow. Additionally, a ratio of minimum to peak glottal airflow was calculated. Results from an analysis of variance indicated no significant group mean difference for any of the dependent measures. A greater variability in peak glottal airflow for the 70-year-old age group as compared to the 20-year-old age group was found. None of the dependent variables were significantly related to age and therefore were not good predictors of age. The results imply that laryngeal senescence in healthy women may not be significant enough to affect the magnitude of phonatory function parameters. Either the assumed anatomical changes produce less significant phonatory change in the healthy individual or the healthy individual is more capable of using strategies to counteract degenerative laryngeal changes.