Remote microphone virtual sensing with multi-microphone configurations

Abstract

Local active noise control applications can greatly benefit from virtual sensing when error microphones cannot be positioned at the location where control is required. A previous study has provided evidence that monitoring microphone configurations comprising nested sub-arrays have the potential to enhance sound field estimation performance in diffuse sound fields. This work extends these findings by investigating the performance of similar microphone configurations in sound fields generated by a two-dimensional source configuration. The estimation accuracy of linear and circular monitoring microphone setups is evaluated, and the findings suggest that the use of nested arrays provides higher estimation accuracy at a larger spatial extent. Furthermore, the robustness of the microphone setups against perturbations is investigated, and it is shown that the configurations with nested arrays suffer from increased sensitivity, which can be partially alleviated with regularisation.

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Identifiers

ORCID for Achilles Kappis: orcid.org/0009-0009-0925-3008

ORCID for Jordan Cheer: orcid.org/0000-0002-0552-5506

ORCID for Aimee Zhang: orcid.org/0000-0001-6817-139X

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