DocumentCode :
151534
Title :
2.5D sound field reproduction in higher order Ambisonics
Author :
Wen Zhang ; Abhayapala, Thushara D.
Author_Institution :
Res. Sch. of Eng., Australian Nat. Univ., Canberra, ACT, Australia
fYear :
2014
fDate :
8-11 Sept. 2014
Firstpage :
342
Lastpage :
346
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 :
acoustic field; audio signal processing; loudspeakers; sound reproduction; 2-dimensional sound field; 2.5-dimensional sound field reproduction; 2.5D sound field reproduction; 2D plane; 2D sound field; 3-dimensional point source; 3D point source; cylindrical wave reproduction; higher order ambisonics; loudspeaker; secondary source; Acoustics; Arrays; Conferences; Decoding; Harmonic analysis; Loudspeakers; Three-dimensional displays; 2.5D reproduction; circular loudspeaker array; higher order Ambisonics;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Acoustic Signal Enhancement (IWAENC), 2014 14th International Workshop on
Conference_Location :
Juan-les-Pins
Type :
conf
DOI :
10.1109/IWAENC.2014.6954315
Filename :
6954315
Link To Document :
بازگشت