Sound-field reproduction systems using fixed-directivity loudspeakers
Sound-field reproduction systems using fixed-directivity loudspeakers
Sound reproduction systems using open arrays of loudspeakers in rooms suffer from degradations due to room reflections. These reflections can be reduced using pre-compensation of the loudspeaker signals, but this requires calibration of the array in the room, and is processor-intensive. This paper examines 3D sound reproduction systems using spherical arrays of fixed-directivity loudspeakers which reduce the sound field radiated outside the array. A generalized form of the simple source formulation and a mode-matching solution are derived for the required loudspeaker weights. The exterior field is derived and expressions for the exterior power and direct to reverberant ratio are derived. The theoretical results and simulations confirm that minimum interference occurs for loudspeakers which have hyper-cardioid polar responses
3590-3601
Poletti, M.
15628849-1ed0-412b-b319-4391c6de4820
Fazi, F.M.
e5aefc08-ab45-47c1-ad69-c3f12d07d807
Nelson, P.A.
5c6f5cc9-ea52-4fe2-9edf-05d696b0c1a9
June 2010
Poletti, M.
15628849-1ed0-412b-b319-4391c6de4820
Fazi, F.M.
e5aefc08-ab45-47c1-ad69-c3f12d07d807
Nelson, P.A.
5c6f5cc9-ea52-4fe2-9edf-05d696b0c1a9
Poletti, M., Fazi, F.M. and Nelson, P.A.
(2010)
Sound-field reproduction systems using fixed-directivity loudspeakers.
Journal of the Acoustical Society of America, 127 (6), .
(doi:10.1121/1.3409486).
Abstract
Sound reproduction systems using open arrays of loudspeakers in rooms suffer from degradations due to room reflections. These reflections can be reduced using pre-compensation of the loudspeaker signals, but this requires calibration of the array in the room, and is processor-intensive. This paper examines 3D sound reproduction systems using spherical arrays of fixed-directivity loudspeakers which reduce the sound field radiated outside the array. A generalized form of the simple source formulation and a mode-matching solution are derived for the required loudspeaker weights. The exterior field is derived and expressions for the exterior power and direct to reverberant ratio are derived. The theoretical results and simulations confirm that minimum interference occurs for loudspeakers which have hyper-cardioid polar responses
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Published date: June 2010
Organisations:
Engineering Science Unit, Fluid Dynamics & Acoustics Group
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Local EPrints ID: 151325
URI: http://eprints.soton.ac.uk/id/eprint/151325
ISSN: 0001-4966
PURE UUID: 59f4cfc6-5194-4127-97f9-5b7d5f0f313c
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Date deposited: 10 May 2010 13:06
Last modified: 14 Mar 2024 02:54
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Author:
M. Poletti
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