Implementation of Sources in an Energy-Stress Tensor Based Diffuse Sound Field Model
Résumé
An implementation of acoustic sources is developed in the context of an energetic wave equation derived from the energy-stress tensor, examined in the one-dimensional case [Dujourdy et al, Acta Acustica united with Acustica 103:480-491, 2017]. The method efficiently models diffuse sound fields that dominate reverberation at higher frequencies and larger distances. Monopole and dipole electroacoustical sources are considered. Using loudspeaker models rather than idealized distributions of sound energy allows for a convenient structure to evaluate directional dependence and frequency dependence for a variety of source types. Compared to initial condition formulations, an explicit source term enables realistic modeling of complex sound sources with the possibility of spatial changes in time. A finite volume time domain (FVTD) approach is utilized to lay the groundwork for future extensions to three dimensions. The spatially invariant model parameters are determined iteratively by comparison with in situ measurements of a long hallway for both the monopole and dipole case in order to verify the validity of the framework.
Domaines
Acoustique [physics.class-ph]
Origine : Fichiers produits par l'(les) auteur(s)
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