TY - GEN
T1 - 2.5D sound field reproduction in higher order Ambisonics
AU - Zhang, Wen
AU - Abhayapala, Thushara D.
N1 - Publisher Copyright:
© 2014 IEEE.
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.
KW - 2.5D reproduction
KW - circular loudspeaker array
KW - higher order Ambisonics
UR - http://www.scopus.com/inward/record.url?scp=84953399374&partnerID=8YFLogxK
U2 - 10.1109/IWAENC.2014.6954315
DO - 10.1109/IWAENC.2014.6954315
M3 - 会议稿件
AN - SCOPUS:84953399374
T3 - 2014 14th International Workshop on Acoustic Signal Enhancement, IWAENC 2014
SP - 342
EP - 346
BT - 2014 14th International Workshop on Acoustic Signal Enhancement, IWAENC 2014
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2014 14th International Workshop on Acoustic Signal Enhancement, IWAENC 2014
Y2 - 8 September 2014 through 11 September 2014
ER -