Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Combination of Adaptive Feedback Cancellation and Binaural Adaptive Filtering in Hearing Aids | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2009 Article ID 968345 15 pages doi 2009 968345 Research Article Combination of Adaptive Feedback Cancellation and Binaural Adaptive Filtering in Hearing Aids Anthony Lombard Klaus Reindl and Walter Kellermann Multimedia Communications and Signal Processing University of Erlangen-Nuremberg Cauerstr. 7 91058 Erlangen Germany Correspondence should be addressed to Anthony Lombard lombard@ Received 12 December 2008 Accepted 17 March 2009 Recommended by Sven Nordholm We study a system combining adaptive feedback cancellation and adaptive filtering connecting inputs from both ears for signal enhancement in hearing aids. For the first time such a binaural system is analyzed in terms of system stability convergence of the algorithms and possible interaction effects. As major outcomes of this study a new stability condition adapted to the considered binaural scenario is presented some already existing and commonly used feedback cancellation performance measures for the unilateral case are adapted to the binaural case and possible interaction effects between the algorithms are identified. For illustration purposes a blind source separation algorithm has been chosen as an example for adaptive binaural spatial filtering. Experimental results for binaural hearing aids confirm the theoretical findings and the validity of the new measures. Copyright 2009 Anthony Lombard et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. 1. Introduction Traditionally signal enhancement techniques for hearing aids HAs were mainly developed independently for each ear 1-4 . However since the human auditory system is a binaural system combining the signals received from both ears for audio perception providing merely bilateral systems .
