title: Fast time domain modeling of surface scattering from reflectors and diffusers.
abstract: Time-domain prediction models have been developed for auditorium reflectors and room acoustic diffusers. The models are time-domain equivalents of the single-frequency formulations that exploit the Kirchhoff boundary conditions. Consequently, they are approximate, wave-based solutions to the Kirchhoff integral equation using surface meshes. The new time-domain formulations are validated by comparison to their frequency-domain equivalents for three different surfaces: a plane surface, a curved reflector, and a Schroeder diffuser. In terms of computation time and accuracy, the new models lie between the finite difference time domain and geometric room models.
authors.affiliation: Acoustics Research Centre, University of Salford, Salford, United Kingdom t.j.cox@salford.ac.uk.
authors.forename: Trevor J
authors.initials: TJ
authors.lastname: Cox