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Flow and Acoustic Effects in the Larynx for Varying Geometries

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Aeroacoustic phenomena are the main contribution to the human voice production process and the aim is to achieve a better understanding of this process by means of numerical simulation. A hybrid numerical approach is thereby used, decoupling computational flow dynamics (CFD) from computational aeroacoustics (CAA). In a first stage the airflow through the larynx with oscillating vocal folds is simulated. In a second stage the acoustic sources are determined and finally the propagation of the acoustic waves, by means of a perturbation approach. The developed tool is capable of analysing different scenarios in voice production. Here, we investigate various glottal geometries and vocal fold oscillations. Thereby, the CFD simulations are run for four glottal opening types: a rectangular form, triangular form, a sinusoidal form and for one case a vocal fold is kept static. Thereby, we study in detail the changes in the flow, the acoustic source terms as well as the generated sound.
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Document Type: Research Article

Publication date: March 1, 2016

More about this publication?
  • Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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