Pressure, flow, and glottal behaviour comparison between the acapella choice device and silicone tube phonation

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61384984%3A51110%2F22%3AN0000111" target="_blank" >RIV/61384984:51110/22:N0000111 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Pressure, flow, and glottal behaviour comparison between the acapella choice device and silicone tube phonation

Original language description

Vibratory positive expiratory pressure (PEP) devices have recently been incorporated as a resource for voice therapy. They resemble silicone tube phonation (STP) in the sense that both involve lengthening of the vocal tract with an additional source of vibration in the vocal tract. PEP devices produce a strong modulation in intraoral pressure and flow values affecting the vocal fold vibration pattern. However, details about the behaviour of STP with regards to its impact on the voice via changes in the pressure and flow profiles in the vocal tract are yet to be investigated. This study compares the impact of phonation into the Acapella Choice (a type of PEP device) and STP on the voice. Three normophonic subjects underwent high-speed videoendoscopy assessment while pressure, flow and electroglottographic data was collected. For STP, water depths between 2 and 12 cm were used. The data was analysed with emphasis on the low frequency oscillation component (produced by the water bubbles or flapping mechanism of the PEP device) and the high frequency component produced by the vocal folds. Phonation into the Acapella device generates large changes in the pressure and flow profiles producing systematic changes in the impedance of the vocal tract. This, in turn, systematically modulates the vibration of the vocal folds producing moments when vibration is aided and hindered. A similar behaviour is seen during STP, however due to the lower changes in intraoral pressure and irregular releasing of the bubbles into the water, the impact on the vocal folds is less pronounced and more unpredictable. PEP devices are more efficient in modulating the pressure and flow profiles in the vocal tract than STP. The large modulation in the vocal fold vibration pattern produced by the PEP device may be considered an important component of therapy (in specific, the massage effect) which should be taken into consideration when designing specific treatments for voice disorders.

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

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OECD FORD branch

30305 - Occupational health

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2022

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů