Advances in Modal Analysis Using a Robust and Multiscale Method

Cécile Picard (1) , Christian Frisson (2) , François Faure (3) , George Drettakis (1) , Paulg Kry

1 REVES - Rendering and virtual environments with sound
2 KU Leuven - Catholic University of Leuven = Katholieke Universiteit Leuven
3 EVASION - Virtual environments for animation and image synthesis of natural objects

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.

Domaines: Informatique [cs]

Cécile Picard, Christian Frisson, François Faure, George Drettakis, Paulg Kry. Advances in Modal Analysis Using a Robust and Multiscale Method. EURASIP Journal on Advances in Signal Processing, 2010, 2010 (1), pp.392782. ⟨hal-00784430v1⟩