Abstract
This paper considers array processing for wideband signals. The optimization techniques and associated performance results correspond to steerable but fixed beam microphone arrays, to be used in hearing aid applications, both in free-space and reverberant conditions. We first review the results on maximum energy (ME) broadband arrays. We subsequently formulate optimization criteria for array subband processing. The uniformly spaced subband and the non-uniformly spaced subband using quadrature mirror filter approaches are treated. Finally, various simulation results for free-space and reverberant conditions are presented to demonstrate the usefulness of this class of microphone arrays, as well as the feasibility of quadrature mirror filter-based subband processing.
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This work was partially supported by the House Ear Institute and the Retirement Research Foundation.
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Lorenzelli, F., Wang, A., Korompis, D. et al. Subband processing for broadband microphone arrays. J VLSI Sign Process Syst Sign Image Video Technol 14, 43–55 (1996). https://doi.org/10.1007/BF00925267
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DOI: https://doi.org/10.1007/BF00925267