Advances in Modal Analysis Using a Robust and Multiscale Method. (21st October 2010)

• Record Type: Journal Article
• Authors: Picard Picard, Cécile Cécile; Frisson Frisson, Christian Christian; Faure Faure, François François; Drettakis Drettakis, George George; Kry Kry, Paul G. Paul G.
• Other Names: Serra Serra Xavier Xavier Academic Editor.
• Is Part Of: EURASIP journal on advances in signal processing. Volume 2010(2010)
• Publication Date: 2010-10-21
• Subjects: Signal processing -- Periodicals; Traitement du signal; Signal processing; Periodicals; 621.3822
• DOI: 10.1155/2010/392782
• Languages: English
• ISSNs: 1687-6172

Abstract

Abstract : This paper 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 nonmanifold 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.