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Sound field simulations at low frequencies often use finite-element or other mesh-based methods. For auralization, output data from these methods need to be converted to a format compatible with auralization methods, such as binaural reproduction, wave field synthesis (WFS), higher order Ambisonics (HOA), or vector base amplitude panning (VBAP). The mesh data can be viewed as a spatial sampling of the sound pressure distribution. A method is proposed for converting the mesh data to plane-wave components using a circular array of virtual sources centered around a reference position. Such a plane-wave decomposition (PWD) is straightforward to process further for auralization. Emphasis is put on generalized modal decompositions of sound fields through singular-value decomposition, and on the relation between modal bandwidth and the ratio of mesh width to wavelength. The special case of a decomposition into cylindrical harmonics is studied in detail. Results are presented for two-dimensional examples, and numerical issues are discussed.
Author (s): Støfringsdal, Bård; Svensson, Peter
Affiliation:
Norwegian University of Science and Technology, Trondheim, Norway
(See document for exact affiliation information.)
Publication Date:
2006-05-06
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Permalink: https://aes2.org/publications/elibrary-page/?id=13682
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Støfringsdal, Bård; Svensson, Peter; 2006; Conversion of Discretely Sampled Sound Field Data to Auralization Formats [PDF]; Norwegian University of Science and Technology, Trondheim, Norway; Paper ; Available from: https://aes2.org/publications/elibrary-page/?id=13682
Støfringsdal, Bård; Svensson, Peter; Conversion of Discretely Sampled Sound Field Data to Auralization Formats [PDF]; Norwegian University of Science and Technology, Trondheim, Norway; Paper ; 2006 Available: https://aes2.org/publications/elibrary-page/?id=13682
@article{støfringsdal2006conversion,
author={støfringsdal bård and svensson peter},
journal={journal of the audio engineering society},
title={conversion of discretely sampled sound field data to auralization formats},
year={2006},
volume={54},
issue={5},
pages={380-400},
month={may},}