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Appl. Sci. 2017, 7(6), 558; doi:10.3390/app7060558

Low Frequency Interactive Auralization Based on a Plane Wave Expansion

Institute of Sound and Vibration Research, University of Southampton, SO17 1BJ, UK
Current address: Faculty of Engineering, Universidad de San Buenaventura Medellín, Cra 56C No 51-110, 050010 Medellín, Colombia.
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Author to whom correspondence should be addressed.
Academic Editors: Woon-Seng Gan and Jung-Woo Choi
Received: 2 March 2017 / Revised: 12 May 2017 / Accepted: 23 May 2017 / Published: 27 May 2017
(This article belongs to the Special Issue Spatial Audio)

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. View Full-Text
Keywords: interactive auralization; plane wave expansion; inverse method; finite element method interactive auralization; plane wave expansion; inverse method; finite element method
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Gómez, D.M.M.; Astley, J.; Fazi, F.M. Low Frequency Interactive Auralization Based on a Plane Wave Expansion. Appl. Sci. 2017, 7, 558.

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