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3D SOUNDFIELD REPRODUCTION USING NON-SPHERICAL LOUDSPEAKER Aastha Gupta and Thushara D. Abhayapala
 

Summary: 3D SOUNDFIELD REPRODUCTION USING NON-SPHERICAL LOUDSPEAKER
ARRAYS
Aastha Gupta and Thushara D. Abhayapala
Applied Signal Processing Group,
Department of Information Engineering, RSISE, CECS
The Australian National University ACT 0200, Canberra, Australia.
{Thushara.Abhayapala, Aastha.Gupta}@anu.edu.au
ABSTRACT
Three dimensional (3D) spatial soundfield reconstruction
techniques typically need multiple loudspeakers placed on
the surface of a sphere covering a desired region of recon-
struction. Such array geometries have certain limitations that
make them impractical in most of the intended applications.
In this paper, we show how to reconstruct 3D soundfields us-
ing a set of circular arrays. The proposed method uses circu-
lar harmonics alongwith the underlying theory of wavefield
propagation. Specifically, we use the properties of the associ-
ated Legendre functions and the spherical Hankel functions
for loudspeaker placement. As an illustration, we design a
third order spherical harmonic reconstruction system using

  

Source: Abhayapala, Thushara D. - Department of Information Engineering, Australian National University

 

Collections: Computer Technologies and Information Sciences