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 A Method for Source-Microphone Range Estimation in Reverberant Environments Using Arrays of Unknown Geometry | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2008 Article ID 849246 10 pages doi 2008 849246 Research Article A Method for Source-Microphone Range Estimation in Reverberant Environments Using Arrays of Unknown Geometry Denis McCarthy and Frank Boland Department of Electronic and Electrical Engineering School of Engineering Trinity College Dublin Ireland Correspondence should be addressed to Denis McCarthy demccart@ Received 18 December 2006 Revised 24 April 2007 Accepted 23 September 2007 Recommended by Joe C. Chen This paper proposes a technique for determining the distance between a sound source and the microphones in an array. The proposed Range-Finder algorithm is robust in the presence of reverberation and in contrast with previously published sourcelocalization techniques does not require knowledge of the relative positions of the microphones. We discuss the factors affecting the accuracy of our range estimates and present the results of experiments using simulated and real data to demonstrate the efficacy of our approach. Copyright 2008 D. McCarthy and F. Boland. 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 Estimating the distance between a source and a receiver has been a central problem in array signal processing since the earliest days of radar and sonar. For indoor applications using microphone arrays such estimates could have use in source localization or speaker tracking. In addition they could inform decisions regarding microphone selection allowing us to select the microphone s nearest the source or farthest from some likely interference. Range estimates could also have use in determining appropriate speech enhancement strategies such as when deciding whether or not to use a dereverberation algorithm. Typically range
