Third International Workshop on Models and Analysis of Vocal Emissions for Biomedical Applications (MAVEBA 2003)
Traditionally, oral contraceptives are considered to have adverse effect on women's voice quality. The purpose of this study was to evaluate the impact of oral contraceptives on voice quality, using acoustic analysis. Acoustic vocal parameters of seven women who use oral contraceptives and seven women who do not were measured repeatedly during the menstrual cycle. Repeated-measure analyses-ofvariance were performed to test for group differences. Results did not reveal an adverse effect in the oral contraceptive users group. Moreover, amplitude and frequency perturbation, as well as noise-to-harmonics ratio values within the test group were found to be significantly lower than those observed among the control group; indicating a more stable voice quality.
Index Terms. voice, vocal-quality, perturbation, hormones, oral-contraceptives
Full Paper (reprinted with permission from Firenze University Press)
Bibliographic reference. Amir, O. / Biron-Shental, T. (2003): "Do oral contraceptives really have an adverse effect on voice quality?", In MAVEBA-2003, 161-164.