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Title: Effects of the Menstrual Cycle and Oral Contraception on Singers' Pitch Control
Author: Lã, FMB
Sundberg, J.
Howard, D.M.
Sá-Coutro, P.
Freitas, A.
Keywords: Intonation
Vibrato rate
Vibrato extent
Menstrual cycle
Oral contraceptive pill
Issue Date: Dec-2012
Publisher: American Speech-Language-Hearing Association
Abstract: Purpose: Difficulties with intonation and vibrato control during the menstrual cycle have been reported by singers; however, this phenomenon has not yet been systematically investigated. Method: A double-blind randomized placebo-controlled trial assessing effects of the menstrual cycle and use of a combined oral contraceptive pill (OCP) on pitch control in singing is presented. Audio-electrolaryngograph recordings were made and blood samples were taken from 9 singers in each of the 3 phases of the menstrual cycle both under the placebo and the OCP conditions for a total of 6 months. Participants sang an exercise consisting of an ascending octave followed by a descending major triad, starting on pitches F4 and B4. Pitch control was assessed in terms of the octave’s deviations from pure intonation and of the vibrato rate and extent. Results: Significant differences were found between the 3 phases of the cycle regarding octave size only for pitch F5 during OCP use. Significant vibrato rate differences between placebo and OCP conditions were found only for pitch F5. Conclusion: OCP use may have an effect on pitch control in singers. Possible explanations point to a complex interaction between hormonal milieu and pitch control, enhancing the need for longitudinal studies.
Peer review: yes
DOI: 10.1044/1092-4388(2011/10-0348)
ISSN: 1558-9102
Appears in Collections:INETmd - Artigos

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