Holographic surround sound systems aim to accurately reproduce a recorded field in a small region of space around one or more listeners. This is possible at low frequencies with well-matched loudspeakers and acoustically treated rooms. At high frequencies the region of accurate reproduction shrinks and source localization is compromised. Furthermore, in typical rooms rooms reflections compromise quality. High quality reproduction therefore requires large numbers of loudspeakers and the use of techniques to reduce unwanted reverberation. This paper considers the use of higher-order loudspeakers that have multiple modes of radiation to offer an extended frequency range and zone of accurate reproduction. In addition, if a higher-order microphone is used for calibration, room effects can be effectively removed.

Authors: Poletti, Mark A.; Betlehem, Terence; Abhayapala, Thushara
Affiliations: Industrial Research Limited, Lower Hutt, New Zealand; Australian National University, Canberra, ACT, Australia(See document for exact affiliation information.)
AES Convention: 133 (October 2012) Paper Number: 8712
Publication Date: October 25, 2012
Subject: Spatial Audio Over Loudspeakers

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