Advances in Modal Analysis Using a Robust and Multiscale Method

Abstract : This article presents a new approach to modal synthesis for rendering sounds of virtual objects. We propose a generic method that preserves sound variety across the surface of an object, at different scales of resolution and for a variety of complex geometries. The technique performs automatic voxelization of a surface model and automatic tuning of the parameters of hexahedral finite elements, based on the distribution of material in each cell. The voxelization is performed using a sparse regular grid embedding of the object, which permits the construction of plausible lower resolution approximations of the modal model. We can compute the audible impulse response of a variety of objects. Our solution is robust and can handle non-manifold geometries that include both volumetric and surface parts. We present a system which allows us to manipulate and tune sounding objects in an appropriate way for games, training simulations, and other interactive virtual environments.
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Cécile Picard, Christian Frisson, François Faure, George Drettakis, Paul Kry. Advances in Modal Analysis Using a Robust and Multiscale Method. EURASIP Journal on Advances in Signal Processing, SpringerOpen, 2010, Special issue on digital audio effects, 2010 (1), pp.392782 :1-12. ⟨10.1155/2010/392782⟩. ⟨hal-00784430v3⟩



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