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báo cáo hóa học:" Research Article Influence of Acoustic Feedback on the Learning Strategies of Neural Network-Based Sound Classifiers in Digital Hearing Aids"

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 Influence of Acoustic Feedback on the Learning Strategies of Neural Network-Based Sound Classifiers in Digital Hearing Aids | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2009 Article ID 465189 10 pages doi 10.1155 2009 465189 Research Article Influence of Acoustic Feedback on the Learning Strategies of Neural Network-Based Sound Classifiers in Digital Hearing Aids Lucas Cuadra EURASIP Member Enrique Alexandre Roberto Gil-Pita EURASIP Member Raul Vicen-Bueno and Lorena Alvarez Departamento de Teoria de la Serial y Comunicaciones Escuela Politecnica Superior Universidad de Alcala 28805 Alcala de Henares Spain Correspondence should be addressed to Lucas Cuadra lucas.cuadra@uah.es Received 1 December 2008 Revised 4 May 2009 Accepted 9 September 2009 Recommended by Hugo Fastl Sound classifiers embedded in digital hearing aids are usually designed by using sound databases that do not include the distortions associated to the feedback that often occurs when these devices have to work at high gain and low gain margin to oscillation. The consequence is that the classifier learns inappropriate sound patterns. In this paper we explore the feasibility of using different sound databases generated according to 18 configurations of real patients and a variety of learning strategies for neural networks in the effort of reducing the probability of erroneous classification. The experimental work basically points out that the proposed methods assist the neural network-based classifier in reducing its error probability in more than 18 . This helps enhance the elderly user s comfort the hearing aid automatically selects with higher success probability the program that is best adapted to the changing acoustic environment the user is facing. Copyright 2009 Lucas Cuadra 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 Acoustic feedback appears when part of the conveniently amplified .