<abstract xmlns="http://www.w3.org/1999/xhtml"><p>Using 3-Dimensional (3D) sound sources as secondary sources to 2-Dimensional (2D) sound field reproduction, it is termed 2.5-Dimensional (2.5D) sound field reproduction which is currently drawing broad interest in acoustic signal processing. In this paper we propose a method to reproduce a 2D sound field, using a circular array of 3D High Order (HO) loudspeakers, which provides a mode matching solution based on 3D wave field translation. Using the spherical addition theorem, we first obtain a spherical harmonics representation of a 2D sound field reproduced by an array of HO loudspeakers. Then, the corresponding relationship between the reproduced sound field and the desired sound field is established by spherical/cylindrical harmonic expansions. Finally, the modal weights of HO loudspeakers are designed by using a least squares method. Simulation results show that the proposed method extends the reproduction region and significantly reduces the required minimum number of loudspeakers over the other referenced methods.</p></abstract>

Using 3-Dimensional (3D) sound sources as secondary sources to 2-Dimensional (2D) sound field reproduction, it is termed 2.5-Dimensional (2.5D) sound field reproduction which is currently drawing broad interest in acoustic signal processing. In this paper we propose a method to reproduce a 2D sound field, using a circular array of 3D High Order (HO) loudspeakers, which provides a mode matching solution based on 3D wave field translation. Using the spherical addition theorem, we first obtain a spherical harmonics representation of a 2D sound field reproduced by an array of HO loudspeakers. Then, the corresponding relationship between the reproduced sound field and the desired sound field is established by spherical/cylindrical harmonic expansions. Finally, the modal weights of HO loudspeakers are designed by using a least squares method. Simulation results show that the proposed method extends the reproduction region and significantly reduces the required minimum number of loudspeakers over the other referenced methods.

2.5D Sound Field Reproduction Using Higher Order Loudspeakers

School of Electronic Information and Control Engineering, Beijing University of Technology, Beijing, 100124 China

Cybernetics and Information Technologies

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

{"article-title":"2.5D Sound Field Reproduction Using Higher Order Loudspeakers"}

Using 3-Dimensional (3D) sound sources as secondary sources to 2-Dimensional (2D) sound field reproduction, it is termed 2.5-Dimensional (2.5D) sound field...

2.5D Sound Field Reproduction Using Higher Order Loudspeakers

Published Online: Dec 30, 2015

Page range: 5 - 15

DOI: https://doi.org/10.1515/cait-2015-0063

Keywords
2.5D reproduction, sound field, high order loudspeaker, circular loudspeaker array

© 2015 Maoshen Jia et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

2.5D Sound Field Reproduction Using Higher Order Loudspeakers

Published Online: Dec 30, 2015

Page range: 5 - 15

DOI: https://doi.org/10.1515/cait-2015-0063

Keywords2.5D reproduction, sound field, high order loudspeaker, circular loudspeaker array

© 2015 Maoshen Jia et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
2.5D reproduction, sound field, high order loudspeaker, circular loudspeaker array