Low frequency interactive auralization based on a plane wave expansion
Low frequency interactive auralization based on a plane wave expansion
This paper addresses the problem of interactive auralization of enclosures based on a finite superposition of plane waves. For this, room acoustic simulations are performed using the Finite Element (FE) method. From the FE solution, a virtual microphone array is created and an inverse method is implemented to estimate the complex amplitudes of the plane waves. The effects of Tikhonov regularization are also considered in the formulation of the inverse problem, which leads to a more efficient solution in terms of the energy used to reconstruct the acoustic field. Based on this sound field representation, translation and rotation operators are derived enabling the listener to move within the enclosure and listen to the changes in the acoustic field. An implementation of an auralization system based on the proposed methodology is presented. The results suggest that the plane wave expansion is a suitable approach to synthesize sound fields. Its advantage lies in the possibility that it offers to implement several sound reproduction techniques for auralization applications. Furthermore, features such as translation and rotation of the acoustic field make it convenient for interactive acoustic renderings.
interactive auralization; plane wave expansion; inverse method; finite element method
558
Murillo Gomez, Diego M.
21406e29-0bad-4420-810b-719706df5430
Astley, Richard
cb7fed9f-a96a-4b58-8939-6db1010f9893
Fazi, Filippo
e5aefc08-ab45-47c1-ad69-c3f12d07d807
Murillo Gomez, Diego M.
21406e29-0bad-4420-810b-719706df5430
Astley, Richard
cb7fed9f-a96a-4b58-8939-6db1010f9893
Fazi, Filippo
e5aefc08-ab45-47c1-ad69-c3f12d07d807
Murillo Gomez, Diego M., Astley, Richard and Fazi, Filippo
(2017)
Low frequency interactive auralization based on a plane wave expansion.
Applied Sciences, 7, .
(doi:10.3390/app7060558).
Abstract
This paper addresses the problem of interactive auralization of enclosures based on a finite superposition of plane waves. For this, room acoustic simulations are performed using the Finite Element (FE) method. From the FE solution, a virtual microphone array is created and an inverse method is implemented to estimate the complex amplitudes of the plane waves. The effects of Tikhonov regularization are also considered in the formulation of the inverse problem, which leads to a more efficient solution in terms of the energy used to reconstruct the acoustic field. Based on this sound field representation, translation and rotation operators are derived enabling the listener to move within the enclosure and listen to the changes in the acoustic field. An implementation of an auralization system based on the proposed methodology is presented. The results suggest that the plane wave expansion is a suitable approach to synthesize sound fields. Its advantage lies in the possibility that it offers to implement several sound reproduction techniques for auralization applications. Furthermore, features such as translation and rotation of the acoustic field make it convenient for interactive acoustic renderings.
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applsci_84933_preprints
- Accepted Manuscript
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applsci-07-00558-v2
- Version of Record
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Accepted/In Press date: 23 May 2017
e-pub ahead of print date: 27 May 2017
Keywords:
interactive auralization; plane wave expansion; inverse method; finite element method
Identifiers
Local EPrints ID: 412623
URI: http://eprints.soton.ac.uk/id/eprint/412623
PURE UUID: c2ae17a3-3d10-4fbe-bfb7-0d9cd5f76178
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Date deposited: 24 Jul 2017 16:32
Last modified: 16 Mar 2024 03:59
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Author:
Diego M. Murillo Gomez
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