Numerical Near Field Optimization of Weighted Delay-and-Sum Microphone Arrays

Conference: IWAENC 2012 - International Workshop on Acoustic Signal Enhancement
09/04/2012 - 09/06/2012 at Aachen, Germany

Proceedings: IWAENC 2012

Pages: 4Language: englishTyp: PDF

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Schäfer, Magnus; Heese, Florian; Wernerus, Jona; Vary, Peter (Institute of Communication Systems and Data Processing, RWTH Aachen University, Germany)

A novel concept for the determination of the weighting coefficients for weighted delay-and-sum microphone arrays is introduced in this contribution. The concept is based on a numerical optimization of the reception characteristic of the microphone array. The optimization procedure is shown to improve the reception characteristic in such a way that it closely approximates a target which can be defined according to the application. Index Terms — Microphone arrays, beamforming, near field, numerical optimization