tailieunhanh - Báo cáo hóa học: " Research Article On a Method for Improving Impulsive Sounds Localization in Hearing Defenders"

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 On a Method for Improving Impulsive Sounds Localization in Hearing Defenders | Hindawi Publishing Corporation EURASIP Journal on Audio Speech and Music Processing Volume 2008 Article ID 274684 7 pages doi 2008 274684 Research Article On a Method for Improving Impulsive Sounds Localization in Hearing Defenders Benny Sallberg 1 Farook Sattar 2 and Ingvar Claesson1 1 Department of Signal Processing Blekinge Institute of Technology Soft Center 372 25 Ronneby Sweden 2 School of Electrical and Electronic Engineering Nanyang Technological University Nanyang Avenue Singapore 639798 Correspondence should be addressed to Benny Sallberg Received 30 October 2007 Revised 14 February 2008 Accepted 8 May 2008 Recommended by Sen Kuo This paper proposes a new algorithm for a directional aid with hearing defenders. Users of existing hearing defenders experience distorted information or in worst cases directional information may not be perceived at all. The users of these hearing defenders may therefore be exposed to serious safety risks. The proposed algorithm improves the directional information for the users of hearing defenders by enhancing impulsive sounds using interaural level difference ILD . This ILD enhancement is achieved by incorporating a new gain function. Illustrative examples and performance measures are presented to highlight the promising results. By improving the directional information for active hearing defenders the new method is found to serve as an advanced directional aid. Copyright 2008 Benny Sallberg 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 In many-cases individuals are forced to use hearing defenders for their protection against harmful levels of sound. Hearing defenders are used to enforce a passive attenuation of the external sounds which enter our ears. The use of existing hearing defenders affect natural sound