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Robustness and Regularization of personal audio systems

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As well as being able to reproduce sound in one region of space, it would be useful to reduce the level of reproduced sound in other spatial regions, with a “personal audio” system. For mobile devices this is motivated by issues of privacy for the user and the need to reduce annoyance for other people nearby. Such personal audio systems can be realized with arrays of loudspeakers that become superdirectional at low frequencies, when the array dimensions are small compared with the acoustic wavelength. The design of the array then becomes a compromise between performance and array effort, defined as the sum of mean squared driving signals. Various methods of formulating this tradeoff as a regularization problem have been suggested and the connection between these formulations is discussed. Large array efforts are due to strongly self-cancelling multipole arrays. A concern is then the robustness of such an array to variations in the acoustic environment and driver sensitivity and position. The design of an array that is robust to these uncertainties then leads to a generalization of regularization.

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Elliott, Stephen J., Cheer, Jordan, Choi, Jung-Woo and Kim, Youngtae (2012) Robustness and Regularization of personal audio systems IEEE Transactions on Audio, Speech and Language Processing, 20, (7), pp. 2123-2133. (doi:10.1109/TASL.2012.2197613).

More information

Published date: 2012
Keywords: array signal processing, loudspeakers, robustness, superdirective beamformer
Organisations: Signal Processing & Control Grp


Local EPrints ID: 340112
ISSN: 1558-7916
PURE UUID: 43d2fed4-c2ae-44ae-8e1d-be5f06fc7b55
ORCID for Jordan Cheer: ORCID iD

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Date deposited: 11 Jun 2012 13:44
Last modified: 18 Jul 2017 05:48

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Author: Jordan Cheer ORCID iD
Author: Jung-Woo Choi
Author: Youngtae Kim

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