Open Access

Advances in Modal Analysis Using a Robust and Multiscale Method

  • Cécile Picard1Email author,
  • Christian Frisson2,
  • François Faure3,
  • George Drettakis1 and
  • Paul G. Kry4
EURASIP Journal on Advances in Signal Processing20102010:392782

https://doi.org/10.1155/2010/392782

Received: 1 March 2010

Accepted: 18 October 2010

Published: 21 October 2010

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.

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Authors’ Affiliations

(1)
REVES/INRIA
(2)
TELE Lab, Université catholique de Louvain (UCL)
(3)
EVASION/INRIA/LJK, Rhône-Alpes Grenoble
(4)
SOCS, McGill University

Copyright

© Cécile Picard et al. 2010

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.