3D audio in rooms with compact wedge arrays
3D audio in rooms with compact wedge arrays
Three dimensional audio from compact loudspeaker arrays has been explored in different forms. A number of techniques intentionally steer beams towards the walls in a room and generate reflections that give the impression of a source at the mirrored position behind the wall. This enables the creation of a system with virtual sources around the listener position. Wedge arrays are particularly suitable for this kind of application because their beamforming technique uses a model that includes the reflections from walls, floor and ceiling of the encompassing wedge. Inside a box-shaped room, the wedge can be either a corner but also a wall, in a wider sense. A method for three-dimensional audio from one or more wedge arrays is proposed. Using beam patterns whose main lobes can be steered both horizontally and vertically, the creation of virtual sources around a listening position is achieved. It is shown that some virtual sources can be created through direct beams and beam reflections, while some can only be synthesised as phantom sources, depending on the respective position of the arrays and the listener in the room. Parametric expressions for the control filters creating the beam patterns are derived and the expected beam pattern obtained from a given wedge array is predicted through simulation.
Hoffmann, Falk-Martin
b5b5b465-9ff4-4eb5-845e-c36c6d1c9b97
Fazi, Filippo
e5aefc08-ab45-47c1-ad69-c3f12d07d807
7 September 2017
Hoffmann, Falk-Martin
b5b5b465-9ff4-4eb5-845e-c36c6d1c9b97
Fazi, Filippo
e5aefc08-ab45-47c1-ad69-c3f12d07d807
Hoffmann, Falk-Martin and Fazi, Filippo
(2017)
3D audio in rooms with compact wedge arrays.
4th International Conference on Spatial Audio, Graz, Austria, , Graz, Austria.
07 - 10 Sep 2017.
8 pp
.
Record type:
Conference or Workshop Item
(Paper)
Abstract
Three dimensional audio from compact loudspeaker arrays has been explored in different forms. A number of techniques intentionally steer beams towards the walls in a room and generate reflections that give the impression of a source at the mirrored position behind the wall. This enables the creation of a system with virtual sources around the listener position. Wedge arrays are particularly suitable for this kind of application because their beamforming technique uses a model that includes the reflections from walls, floor and ceiling of the encompassing wedge. Inside a box-shaped room, the wedge can be either a corner but also a wall, in a wider sense. A method for three-dimensional audio from one or more wedge arrays is proposed. Using beam patterns whose main lobes can be steered both horizontally and vertically, the creation of virtual sources around a listening position is achieved. It is shown that some virtual sources can be created through direct beams and beam reflections, while some can only be synthesised as phantom sources, depending on the respective position of the arrays and the listener in the room. Parametric expressions for the control filters creating the beam patterns are derived and the expected beam pattern obtained from a given wedge array is predicted through simulation.
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Hoffmann, Fazi - 3D Audio in Rooms with Compact Wedge Arrays
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Published date: 7 September 2017
Venue - Dates:
4th International Conference on Spatial Audio, Graz, Austria, , Graz, Austria, 2017-09-07 - 2017-09-10
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Local EPrints ID: 418395
URI: http://eprints.soton.ac.uk/id/eprint/418395
PURE UUID: db4b4434-2e15-43aa-b567-9d2bd84f6911
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Date deposited: 06 Mar 2018 17:30
Last modified: 16 Mar 2024 03:59
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Author:
Falk-Martin Hoffmann
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