Summary
The study assessed 30 nonprofessional singers to evaluate the effects of vocal tract
shape adjustment via increased resonance toward an externally applied sinusoidal frequency
of 900 Hz without phonation. The amplification of the sound wave was used as biofeedback
signal and the intensity and the formant position of the basic vowels /a/, /e/, /i/,
/o/, and /u/ were compared before and after a vocal tract adjustment period. After
the adjustment period, the intensities for all vowels increased and the measured changes
correlated with the participants’ self-perception.The diferences between the second
formant position of the vowels and the applied frequency influences the changes in
amplitude and in formant frequencies. The most significant changes in formant frequency
occurred with vowels that did not include a formant frequency of 900 Hz, while the
increase in amplitude was the strongest for vowels with a formant frequency of about
900 Hz.
Key Words
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Article info
Publication history
Published online: November 15, 2018
Accepted:
October 17,
2018
Identification
Copyright
© 2018 The Voice Foundation. Published by Elsevier Inc. All rights reserved.
