A theoretical study of sound field reconstruction techniques
A theoretical study of sound field reconstruction techniques
Three different methods for the physical analysis and synthesis of sound fields are presented and compared: the least squares method, a method based on the Kirchhoff-Helmholtz integral equation and the generalised Fourier transform method (based on spherical harmonics). These
three methods constitute the basis for many active control technologies and for some modern multi-channel audio technologies, such as High Order Ambisonics and Wave Field Synthesis. It is analytically demonstrated that the three methods have an equivalent formal background. It is shown that the three techniques give identical reconstruction performance in the target frequency range when using the same number of transducers, regularly arranged over a sphere. The analytical results are confirmed by using numerical simulations.
Fazi, Filippo Maria
e5aefc08-ab45-47c1-ad69-c3f12d07d807
Nelson, Philip A.
5c6f5cc9-ea52-4fe2-9edf-05d696b0c1a9
September 2007
Fazi, Filippo Maria
e5aefc08-ab45-47c1-ad69-c3f12d07d807
Nelson, Philip A.
5c6f5cc9-ea52-4fe2-9edf-05d696b0c1a9
Fazi, Filippo Maria and Nelson, Philip A.
(2007)
A theoretical study of sound field reconstruction techniques.
19th International Congress on Acoustics, Madrid, Spain.
02 - 07 Sep 2007.
6 pp
.
Record type:
Conference or Workshop Item
(Paper)
Abstract
Three different methods for the physical analysis and synthesis of sound fields are presented and compared: the least squares method, a method based on the Kirchhoff-Helmholtz integral equation and the generalised Fourier transform method (based on spherical harmonics). These
three methods constitute the basis for many active control technologies and for some modern multi-channel audio technologies, such as High Order Ambisonics and Wave Field Synthesis. It is analytically demonstrated that the three methods have an equivalent formal background. It is shown that the three techniques give identical reconstruction performance in the target frequency range when using the same number of transducers, regularly arranged over a sphere. The analytical results are confirmed by using numerical simulations.
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Fazi_Nelson_ICA2007.pdf
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Published date: September 2007
Venue - Dates:
19th International Congress on Acoustics, Madrid, Spain, 2007-09-02 - 2007-09-07
Organisations:
Acoustics Group
Identifiers
Local EPrints ID: 147337
URI: http://eprints.soton.ac.uk/id/eprint/147337
PURE UUID: b7255d43-b12a-4202-ae54-fb058ae8a699
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Date deposited: 10 Jun 2010 11:54
Last modified: 14 Mar 2024 02:54
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