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On the Alignment of...
On the Alignment of Acoustic and Coupled Mechanic-Acoustic Eigenmodes in Phonation by Supraglottal Duct Variations
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- Kraxberger, Florian (författare)
- Institute of Fundamentals and Theory in Electrical Engineering (IGTE), Graz University of Technology, Inffeldgasse 18/I, Graz, 8010, Austria
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- Näger, Christoph (författare)
- Institute of Fluid Mechanics (LSTM), Friedrich-Alexander-Universität Erlangen-Nürnberg, Cauerstraße 4, Erlangen, 91058, Germany
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- Laudato, Marco (författare)
- KTH,Linné Flow Center, FLOW,Strömningsmekanik och Teknisk Akustik
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- Sundström, Elias (författare)
- KTH,Tillämpad strömningsmekanik,Linné Flow Center, FLOW
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- Becker, Stefan (författare)
- Institute of Fluid Mechanics (LSTM), Friedrich-Alexander-Universität Erlangen-Nürnberg, Cauerstraße 4, Erlangen, 91058, Germany
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- Mihaescu, Mihai, Professor, 1976- (författare)
- KTH,Linné Flow Center, FLOW,Strömningsmekanik och Teknisk Akustik
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- Kniesburges, Stefan (författare)
- Division of Phoniatrics and Pediatric Audiology, Department of Otorhinolaryngology, Head & Neck Surgery, Friedrich-Alexander-Universität Erlangen-Nürnberg, Waldstraße 1, Erlangen, 91054, Germany
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- Schoder, Stefan (författare)
- Institute of Fundamentals and Theory in Electrical Engineering (IGTE), Graz University of Technology, Inffeldgasse 18/I, Graz, 8010, Austria
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(creator_code:org_t)
- MDPI AG, 2023
- 2023
- Engelska.
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Ingår i: Bioengineering. - : MDPI AG. - 2306-5354. ; 10:12
- Relaterad länk:
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https://doi.org/10.3...
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https://urn.kb.se/re...
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https://doi.org/10.3...
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Abstract
Ämnesord
Stäng
- Sound generation in human phonation and the underlying fluid–structure–acoustic interaction that describes the sound production mechanism are not fully understood. A previous experimental study, with a silicone made vocal fold model connected to a straight vocal tract pipe of fixed length, showed that vibroacoustic coupling can cause a deviation in the vocal fold vibration frequency. This occurred when the fundamental frequency of the vocal fold motion was close to the lowest acoustic resonance frequency of the pipe. What is not fully understood is how the vibroacoustic coupling is influenced by a varying vocal tract length. Presuming that this effect is a pure coupling of the acoustical effects, a numerical simulation model is established based on the computation of the mechanical-acoustic eigenvalue. With varying pipe lengths, the lowest acoustic resonance frequency was adjusted in the experiments and so in the simulation setup. In doing so, the evolution of the vocal folds’ coupled eigenvalues and eigenmodes is investigated, which confirms the experimental findings. Finally, it was shown that for normal phonation conditions, the mechanical mode is the most efficient vibration pattern whenever the acoustic resonance of the pipe (lowest formant) is far away from the vocal folds’ vibration frequency. Whenever the lowest formant is slightly lower than the mechanical vocal fold eigenfrequency, the coupled vocal fold motion pattern at the formant frequency dominates.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Strömningsmekanik och akustik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Fluid Mechanics and Acoustics (hsv//eng)
Nyckelord
- finite element model
- fluid-structure-acoustic interaction
- mechanical-acoustical eigenvalue simulation
- vocal fold motion
- voice production
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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