Summary
Objective
This study analyzes the effects of the vocal exercises called semi-occluded nasal
tract exercises (SONTEs), which were carried out with a new appliance that extends
the nasal cavity as a part of the vocal tract. The acoustic, aerodynamic and electroglottographic
(EGG) measurements were compared with those of the traditional semi-occluded vocal
tract exercises (SOVTEs) of phonation in water.
Methods
In this study, 34 women were randomly asked to perform phonation in water for 5 min
through the nasal and oral routes with the sounds /m/ and /ɔ/, respectively, using
a tube with a submersion depth of 5 cm. The acoustic, aerodynamic and EGG measurements
before and after the exercises were analyzed using the appropriate statistical methods.
Results
No significant difference was found in the time and frequency domain parameters before
and after the exercises, except for the amplitude perturbation quotient (APQ) values,
which decreased after both exercises. In addition, there was no significant difference
in any aerodynamic parameters before and after the exercises, but the mean SPL values
significantly increased after both exercises. The oral and nasal peak inspiratory
flow rates increased after both exercises, but the increase peaked after the SONTEs
implementation. As expected, the EGG–jitter and EGG–periodicity values had a reciprocal
interaction with each other, while differences were observed between the values of
the vocal fold movements measured in both exercises.
Conclusions
SONTEs may be as effective as the conventional SOVTEs because it made tube phonation
into water possible through artificial extension of the nasal cavity and increased
the resonant effect by using the positive effects based on the principles of SOVTEs.
Key Words
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Article info
Publication history
Published online: December 24, 2022
Accepted:
November 17,
2022
Publication stage
In Press Corrected ProofIdentification
Copyright
© 2022 The Voice Foundation. Published by Elsevier Inc. All rights reserved.
