Pressure-matching beamforming method for loudspeaker arrays with frequency dependent selection of control points
Pressure-matching beamforming method for loudspeaker arrays with frequency dependent selection of control points
The Pressure-Matching Method (PMM) is a signal processing technique used to generate the digital filters required by a loudspeaker array to reproduce a desired sound field. System performance depends on the choice of a number of parameters of the numerical algorithm, such as the target field and the regularization factor. If a target sound field is chosen with large amplitude variation between the so-called control points, performance might also depend on the relative distance between these points in relation to a the wavelength of the sound to be reproduced. If this distance is too small, the accuracy of the reproduced field may be reduced at the listener location. A strategy is proposed to improve the PMM that is based on a frequency-dependent selection of the control points that contribute to the PMM cost function. By means of numerical simulations and experiments in anechoic environment, it is shown that the proposed method allows for accurate control of the response of the reproduced field at the listener location.
Olivieri, Ferdinando
02d11b82-4e34-441f-9e04-60fb117d6617
Fazi, Filippo Maria
e5aefc08-ab45-47c1-ad69-c3f12d07d807
Shin, Mincheol
2c911163-f027-4c79-8a7b-368f326c46e7
Nelson, Philip
5c6f5cc9-ea52-4fe2-9edf-05d696b0c1a9
6 May 2015
Olivieri, Ferdinando
02d11b82-4e34-441f-9e04-60fb117d6617
Fazi, Filippo Maria
e5aefc08-ab45-47c1-ad69-c3f12d07d807
Shin, Mincheol
2c911163-f027-4c79-8a7b-368f326c46e7
Nelson, Philip
5c6f5cc9-ea52-4fe2-9edf-05d696b0c1a9
Olivieri, Ferdinando, Fazi, Filippo Maria, Shin, Mincheol and Nelson, Philip
(2015)
Pressure-matching beamforming method for loudspeaker arrays with frequency dependent selection of control points.
Audio Engineering Society Convention 138th, Poland, Republic of, Poland.
06 - 09 May 2015.
Record type:
Conference or Workshop Item
(Paper)
Abstract
The Pressure-Matching Method (PMM) is a signal processing technique used to generate the digital filters required by a loudspeaker array to reproduce a desired sound field. System performance depends on the choice of a number of parameters of the numerical algorithm, such as the target field and the regularization factor. If a target sound field is chosen with large amplitude variation between the so-called control points, performance might also depend on the relative distance between these points in relation to a the wavelength of the sound to be reproduced. If this distance is too small, the accuracy of the reproduced field may be reduced at the listener location. A strategy is proposed to improve the PMM that is based on a frequency-dependent selection of the control points that contribute to the PMM cost function. By means of numerical simulations and experiments in anechoic environment, it is shown that the proposed method allows for accurate control of the response of the reproduced field at the listener location.
This record has no associated files available for download.
More information
Published date: 6 May 2015
Venue - Dates:
Audio Engineering Society Convention 138th, Poland, Republic of, Poland, 2015-05-06 - 2015-05-09
Organisations:
Acoustics Group
Identifiers
Local EPrints ID: 377950
URI: http://eprints.soton.ac.uk/id/eprint/377950
PURE UUID: 2bb4c2e5-ab83-41c2-bdae-79bb3e8f29aa
Catalogue record
Date deposited: 23 Jun 2015 14:02
Last modified: 02 Sep 2023 01:41
Export record
Contributors
Author:
Ferdinando Olivieri
Author:
Mincheol Shin
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics
