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Theory and design of sound field reproduction in reverberant Terence Betlehem and Thushara D. Abhayapalaa)

Summary: Theory and design of sound field reproduction in reverberant
Terence Betlehem and Thushara D. Abhayapalaa)
Department of Telecommunications Engineering, Research School of Information Sciences and Engineering,
Australian National University, Canberra ACT 0200, Australia
Received 19 July 2004; revised 6 January 2005; accepted 7 January 2005
With the recent emergence of surround sound technology, renewed interest has been shown in the
problem of sound field reproduction. However, in practical acoustical environments, the
performance of sound reproduction techniques are significantly degraded by reverberation. In this
paper, we develop a method of sound field reproduction for reverberant environments. The key to
this method is an efficient parametrization of the acoustic transfer function over a region of space.
Using this parametrization, a practical method has been provided for determining the transfer
function between each loudspeaker and every point in the reproduction region. Through several
simulation examples, the reverberant field designs have been shown to yield a reproduction accuracy
as good as conventional free-field designs, and better than multipoint least squares designs when
loudspeaker numbers are limited. The successful reproduction of sound over a wide frequency range
has also been demonstrated. This approach reveals the appropriate choices for fundamental design
parameters. 2005 Acoustical Society of America. DOI: 10.1121/1.1863032
PACS numbers: 43.60.Dh, 43.38.Md, 43.55.Br NX Pages: 21002111


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


Collections: Computer Technologies and Information Sciences