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Abstract
Volumetric wave-based acoustic simulation relies on the complete solution to the 3D wave equation over a spatial grid. Detailed modeling of sources, however, requires interpolation over the grid, which is complicated by the directional character of the source itself. In this article, a new model of point sources of arbitrary directivity and location with respect to an underlying grid is presented. The model is framed in the spatio-temporal domain directly through the differentiation of Dirac distributions, leading to a spatial Fourier-based approximation strategy. Various approximants are presented, of both separable and non-separable type, and allowing for optimisation over a specified wavenumber range. Such approximants are then employed in a finite difference time domain setting, yielding numerical results for sources of various types, which are then compared against exact solutions.
Original language | English |
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Pages (from-to) | 415-428 |
Journal | IEEE/ACM Transactions on Audio, Speech and Language Processing |
Volume | 27 |
Issue number | 2 |
Early online date | 14 Nov 2018 |
DOIs | |
Publication status | Published - Feb 2019 |
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Dive into the research topics of 'Directional sources in wave-based acoustic simulation'. Together they form a unique fingerprint.Projects
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Stefan Bilbao
- Edinburgh College of Art - Personal Chair of Acoustics and Audio Signal Processing
- Acoustics and Audio Group
Person: Academic: Research Active