An Introduction to Virtual Phased Arrays for Beamforming Applications
An Introduction to Virtual Phased Arrays for Beamforming Applications
Sound localization problems are usually tackled by the acquisition of data from phased microphone arrays and the application of acoustic holography or beamforming algorithms. However, the number of sensors required to achieve reliable results is often prohibitive, particularly if the frequency range of
interest is wide. It is shown that the number of sensors required can be reduced dramatically providing the sound field is time stationary. The use of scanning techniques such as “Scan & Paint” allows for the gathering of data across a sound field in a fast and efficient way , using a single sensor and webcam only.
It is also possible to characterize the relative phase field by including an additional static microphone during the acquisition process. This paper presents the theoretical and experimental basis of the proposed method to localise sound sources using only one fixed microphone and one moving acoustic sensor. The
accuracy and resolution of the method have been proven to be comparable to large microphone arrays, thus constituting the so called “virtual phased arrays”.
beamforming, source localization, virtual phased arrays, measurement techniques
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Fernandez Comesana, Daniel, Fernandez
626fb5ea-8f54-4559-a5d7-5065502610cb
Holland, Keith
90dd842b-e3c8-45bb-865e-3e7da77ec703
Garcia Escribano, Dolores
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de Bree, Hans-Elias
6fe193e6-129d-4389-93cb-47d66bdc495f
March 2014
Fernandez Comesana, Daniel, Fernandez
626fb5ea-8f54-4559-a5d7-5065502610cb
Holland, Keith
90dd842b-e3c8-45bb-865e-3e7da77ec703
Garcia Escribano, Dolores
0df464b9-937f-4d78-ab0d-c9fba97a1561
de Bree, Hans-Elias
6fe193e6-129d-4389-93cb-47d66bdc495f
Fernandez Comesana, Daniel, Fernandez, Holland, Keith, Garcia Escribano, Dolores and de Bree, Hans-Elias
(2014)
An Introduction to Virtual Phased Arrays for Beamforming Applications.
Archives of Acoustics, 39 (1), .
(doi:10.2478/aoa-2014-0009).
Abstract
Sound localization problems are usually tackled by the acquisition of data from phased microphone arrays and the application of acoustic holography or beamforming algorithms. However, the number of sensors required to achieve reliable results is often prohibitive, particularly if the frequency range of
interest is wide. It is shown that the number of sensors required can be reduced dramatically providing the sound field is time stationary. The use of scanning techniques such as “Scan & Paint” allows for the gathering of data across a sound field in a fast and efficient way , using a single sensor and webcam only.
It is also possible to characterize the relative phase field by including an additional static microphone during the acquisition process. This paper presents the theoretical and experimental basis of the proposed method to localise sound sources using only one fixed microphone and one moving acoustic sensor. The
accuracy and resolution of the method have been proven to be comparable to large microphone arrays, thus constituting the so called “virtual phased arrays”.
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e-pub ahead of print date: 1 March 2014
Published date: March 2014
Keywords:
beamforming, source localization, virtual phased arrays, measurement techniques
Identifiers
Local EPrints ID: 412431
URI: http://eprints.soton.ac.uk/id/eprint/412431
ISSN: 0137-5075
PURE UUID: be37892e-5ee5-4f7e-8622-0eea57a1f2e7
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Date deposited: 17 Jul 2017 13:42
Last modified: 15 Mar 2024 13:43
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Contributors
Author:
Daniel, Fernandez Fernandez Comesana
Author:
Keith Holland
Author:
Dolores Garcia Escribano
Author:
Hans-Elias de Bree
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