Energy evolution in enclosure geometries as exhibited by a finite difference time domain method

Abstract

Measurements and simulations conducted for the purpose of extracting or constructing impulse responses are inextricably dependent on a limited number of receiver locations. Wave based simulations offer the opportunity to assess an entire evolving sound field. In this work, a finite difference time domain method is implemented to simulate an evolving sound field in a range of enclosure geometries with reflective boundaries. The distribution of energy is monitored statistically, and evidence is presented for the predictability of this evolution based on room geometry alone. © 2013 Acoustical Society of America.