2018
DOI: 10.1121/1.5054079
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Two-dimensional multizone sound field reproduction using a wave-domain method

Abstract: This paper addresses a two-dimensional multizone sound field reproduction approach using a wave-domain method. The desired sound fields in the bright and dark zones are described as orthogonal expansions of basis functions over the regions. The loudspeaker weights are obtained by maximizing the contrast among multiple zones in the wave domain. Simulation results demonstrate that compared with the conventional acoustic contrast control approach, the proposed method improves the level of acoustic contrast and ar… Show more

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Cited by 15 publications
(5 citation statements)
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“…Several numerical methods employing optimization frameworks are also used especially in solving acoustic inverse problems for biomedical imaging [45], subsurface imaging [7] and sound propagation in waveguides [27]. Other approaches include wave-domain methods (as used in [17,18]) and modal-domain approaches (for instance [37,51]). The approach employed in this paper (as well as previous works such as [11,12,21,39,40]) is the use of the Green's function to represent the solution to the Helmholtz equation in terms of a propagator operator and then employ a Tikhonov regulariation scheme with the Morozov discrepancy principle to solve the resulting operatorial equation.…”
Section: Introductionmentioning
confidence: 99%
“…Several numerical methods employing optimization frameworks are also used especially in solving acoustic inverse problems for biomedical imaging [45], subsurface imaging [7] and sound propagation in waveguides [27]. Other approaches include wave-domain methods (as used in [17,18]) and modal-domain approaches (for instance [37,51]). The approach employed in this paper (as well as previous works such as [11,12,21,39,40]) is the use of the Green's function to represent the solution to the Helmholtz equation in terms of a propagator operator and then employ a Tikhonov regulariation scheme with the Morozov discrepancy principle to solve the resulting operatorial equation.…”
Section: Introductionmentioning
confidence: 99%
“…Given that 3D spatial information on the desired waves is prepared in advance, only a single circular loudspeaker array is required for 2.5D wave field reproduction. The circular array can be used in various fields, such as multi-sound zone reproduction and personal sound zones [11,12]. Accordingly, research has been conducted on noise control over a horizontal plane combined with wave field reproduction and ANC, and a study was pursued on pulse noise removal via fixed control filtering based on wave field synthesis [13,14].…”
Section: Introductionmentioning
confidence: 99%
“…To achieve such personal sound zones, the multizone reproduction was firstly formulated as creating a bright zone and a dark zone by maximizing the ratio of energy in the two zones, which is known as the acoustic contrast control method [1,2,3]. Since then, different approaches based on the acoustic contrast control have been proposed, including the pressure matching approach [4,5,6,7], and the modaldomain approach [8,9,10,11]. Besides of creating such two kinds of sound zones (i.e., the bright zone and dark zone), the generation of two zones of silence was investigated in [12].…”
Section: Introductionmentioning
confidence: 99%