2.5D sound field reproduction in higher order Ambisonics

Wen Zhang; Thushara D. Abhayapala

doi:10.1109/IWAENC.2014.6954315

2.5D sound field reproduction in higher order Ambisonics

Wen Zhang, Thushara D. Abhayapala

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

24 Citations (Scopus)

Abstract

In this paper, we present a theoretical basis and implementation strategies for 2.5-dimensional (2.5D) sound field reproduction in higher order Ambisonics. The issue associated with 2.5D system is the intrinsic dimensionality mismatch between a desired 2-dimensional (2D) sound field and the loudspeaker employed for reproduction, whose spatial properties are more accurately modelled by that of a 3-dimensional (3D) point source. We formulate this dimensionality mismatch problem in higher order Ambisonics and show that referencing the desired 2D sound field with the corresponding reproduced sound field at the reproduction centre would give the most accurate results. We also derive analytical solutions using 3D point sources as secondary sources for both 2D plane wave and cylindrical wave reproduction. The reproduction accuracy of the proposed method is verified through numerical simulations.

Original language	English
Title of host publication	2014 14th International Workshop on Acoustic Signal Enhancement, IWAENC 2014
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	342-346
Number of pages	5
ISBN (Electronic)	9781479968084
DOIs	https://doi.org/10.1109/IWAENC.2014.6954315
Publication status	Published - 11 Nov 2014
Event	2014 14th International Workshop on Acoustic Signal Enhancement, IWAENC 2014 - Juan-les-Pins, France Duration: 8 Sept 2014 → 11 Sept 2014

Publication series

Name	2014 14th International Workshop on Acoustic Signal Enhancement, IWAENC 2014

Conference

Conference	2014 14th International Workshop on Acoustic Signal Enhancement, IWAENC 2014
Country/Territory	France
City	Juan-les-Pins
Period	8/09/14 → 11/09/14

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10.1109/IWAENC.2014.6954315

Cite this

Zhang, W., & Abhayapala, T. D. (2014). 2.5D sound field reproduction in higher order Ambisonics. In 2014 14th International Workshop on Acoustic Signal Enhancement, IWAENC 2014 (pp. 342-346). Article 6954315 (2014 14th International Workshop on Acoustic Signal Enhancement, IWAENC 2014). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/IWAENC.2014.6954315

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title = "2.5D sound field reproduction in higher order Ambisonics",

abstract = "In this paper, we present a theoretical basis and implementation strategies for 2.5-dimensional (2.5D) sound field reproduction in higher order Ambisonics. The issue associated with 2.5D system is the intrinsic dimensionality mismatch between a desired 2-dimensional (2D) sound field and the loudspeaker employed for reproduction, whose spatial properties are more accurately modelled by that of a 3-dimensional (3D) point source. We formulate this dimensionality mismatch problem in higher order Ambisonics and show that referencing the desired 2D sound field with the corresponding reproduced sound field at the reproduction centre would give the most accurate results. We also derive analytical solutions using 3D point sources as secondary sources for both 2D plane wave and cylindrical wave reproduction. The reproduction accuracy of the proposed method is verified through numerical simulations.",

keywords = "2.5D reproduction, circular loudspeaker array, higher order Ambisonics",

author = "Wen Zhang and Abhayapala, {Thushara D.}",

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Zhang, W & Abhayapala, TD 2014, 2.5D sound field reproduction in higher order Ambisonics. in 2014 14th International Workshop on Acoustic Signal Enhancement, IWAENC 2014., 6954315, 2014 14th International Workshop on Acoustic Signal Enhancement, IWAENC 2014, Institute of Electrical and Electronics Engineers Inc., pp. 342-346, 2014 14th International Workshop on Acoustic Signal Enhancement, IWAENC 2014, Juan-les-Pins, France, 8/09/14. https://doi.org/10.1109/IWAENC.2014.6954315

2.5D sound field reproduction in higher order Ambisonics. / Zhang, Wen; Abhayapala, Thushara D.
2014 14th International Workshop on Acoustic Signal Enhancement, IWAENC 2014. Institute of Electrical and Electronics Engineers Inc., 2014. p. 342-346 6954315 (2014 14th International Workshop on Acoustic Signal Enhancement, IWAENC 2014).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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T1 - 2.5D sound field reproduction in higher order Ambisonics

AU - Zhang, Wen

AU - Abhayapala, Thushara D.

PY - 2014/11/11

Y1 - 2014/11/11

N2 - In this paper, we present a theoretical basis and implementation strategies for 2.5-dimensional (2.5D) sound field reproduction in higher order Ambisonics. The issue associated with 2.5D system is the intrinsic dimensionality mismatch between a desired 2-dimensional (2D) sound field and the loudspeaker employed for reproduction, whose spatial properties are more accurately modelled by that of a 3-dimensional (3D) point source. We formulate this dimensionality mismatch problem in higher order Ambisonics and show that referencing the desired 2D sound field with the corresponding reproduced sound field at the reproduction centre would give the most accurate results. We also derive analytical solutions using 3D point sources as secondary sources for both 2D plane wave and cylindrical wave reproduction. The reproduction accuracy of the proposed method is verified through numerical simulations.

AB - In this paper, we present a theoretical basis and implementation strategies for 2.5-dimensional (2.5D) sound field reproduction in higher order Ambisonics. The issue associated with 2.5D system is the intrinsic dimensionality mismatch between a desired 2-dimensional (2D) sound field and the loudspeaker employed for reproduction, whose spatial properties are more accurately modelled by that of a 3-dimensional (3D) point source. We formulate this dimensionality mismatch problem in higher order Ambisonics and show that referencing the desired 2D sound field with the corresponding reproduced sound field at the reproduction centre would give the most accurate results. We also derive analytical solutions using 3D point sources as secondary sources for both 2D plane wave and cylindrical wave reproduction. The reproduction accuracy of the proposed method is verified through numerical simulations.

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M3 - Conference contribution

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BT - 2014 14th International Workshop on Acoustic Signal Enhancement, IWAENC 2014

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2.5D sound field reproduction in higher order Ambisonics

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