Coupled vibroacoustic finite element model of the sound production of the xylophone

Ulveczki, Mihály Ádám and Rucz, Péter (2020) Coupled vibroacoustic finite element model of the sound production of the xylophone. In: DAGA 2020 - 46. Jahrestagung für Akustik, Hannover, Germany.

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Abstract

Computer-aided design and simulation-based virtual prototyping play an increasingly important role in the design and optimization of new musical instrument models. These methods help to create precisely tuned, high-quality products and also facilitate the preparation of series production. In the case of the xylophone, two elements have a decisive role in the sound emission of the instrument: the sound bar and the resonator, which interact with each other and with the excitation produced by the mallet. For modeling realistic geometries (irregular tuning cuts, or resonators of various shapes), numerical tools, such as the finite element method, are necessarily applied. In this contribution the vibroacoustic behavior of the sound bars and resonators of a xylophone are investigated, first independently, and then in a coupled model considering the two-way interactions of these elements. The implementation is validated by means of various tests and also by comparison with measured data. The established fully coupled model can be utilized for virtual prototyping, and for synthesizing xylophone sounds, in addition. Finally, the influence of changing certain parameters of the system on the perceived sound is illustrated, highlighting the importance of two-way coupling between sound bars and resonators.

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