Precomputed acceleration noise for improved rigid-body sound

We introduce an efficient method for synthesizing acceleration noise – sound produced when an object experiences abrupt rigidbody acceleration due to collisions or other contact events. We approach this in two main steps. First, we estimate continuous contact force profiles from rigid-body impulses using a simple model based on Hertz contact theory. Next, we compute solutions to the acoustic wave equation due to short acceleration pulses in each rigid-body degree of freedom. We introduce an efficient representation for these solutions – Precomputed Acceleration Noise – which allows us to accurately estimate sound due to arbitrary rigid-body accelerations. We find that the addition of acceleration noise significantly complements the standard modal sound algorithm, especially for small objects. CR Categories: I.3.5 [Computer Graphics]: Computational Geometry and Object Modeling—Physically based modeling; I.6.8 [Simulation and Modeling]: Types of Simulation—Animation; H.5....

• Type: Journal
• Year: 2012
• Where: TOG
• Authors: Jeffrey N. Chadwick, Changxi Zheng, Doug L. James
• Keywords: Acoustic Wave Equation, Communications, Computational Geometry, CR Categories, TOG 2012