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|title: ||Effects of the Menstrual Cycle and Oral Contraception on Singers' Pitch Control|
|authors: ||Lã, FMB|
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
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.|
|publisher version/DOI: ||http://dx.doi.org/10.1044/1092-4388(2011/10-0348)|
|source: ||Journal of Speech, Language, and Hearing Research|
|appears in collections||INETmd - Artigos|
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