Publications-Detail

Numerical Near Field Optimization of a Non-Uniform Sub-band Filter-and-Sum Beamformer

Authors:
Heese, F.Schäfer, M. ,  Wernerus, J. ,  Vary, P.
Book Title:
Proceedings of IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP)
Organization:
IEEE
Date:
May. 2013
Language:
English

Abstract

A novel near field filter-and-sum beamformer using non uniform frequency sub-bands is presented. The concept is based on numerical optimization of the reception characteristic of the microphone array. In order to improve the reception characteristic over frequency and space, a non uniform filterbank is utilized to subdivide the frequency range. Individual optimization processes for each sub-band result in a clearly improved reception characteristic. The new system is able to closely approximate a target (independently of the frequency) which can be defined according to the application.

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