Title :
Localization of acoustic sources in an enclosed space by double layer beamforming array
Author :
Liu, Yue-Chan ; He, Yuan-An ; Sun, Chao ; Shang, Da-Jing
Author_Institution :
Key Lab. of Sci. & Technol. on Underwater Acoust., Harbin Eng. Univ., Harbin, China
Abstract :
Acoustic sources´ localization by beamforming technology in an enclosed space is not easy due to the interference of reflected waves. Previous methods of beamforming are based on a free field hypothesis; therefore, problems are appeared when this technology is used in reverberation. The paper presents a method combined with particle velocity beamforming for locating acoustic sources in an enclosure by using double parallel surfaces beamforming array. The interference of reflected waves can be removed by taking twice-weighted for double layer array. The performances of this method are simulated by locating multiple coherent acoustic sources in shallow water. The simulation results show the effectiveness of proposed method in an enclosed space.
Keywords :
acoustic arrays; acoustic radiators; acoustic signal processing; acoustic wave interference; acoustic wave reflection; array signal processing; underwater sound; acoustic source localization; double layer array; double parallel surface beamforming array; enclosed space; free field hypothesis; multiple coherent acoustic sources; particle velocity beamforming; reflected wave interference; reverberation; shallow water; twice-weighted array; Acoustic measurements; Array signal processing; Arrays; Interference; Microphones; Reverberation; Double layer beamforming array; Enclosed space; Particle velocity beamforming;
Conference_Titel :
Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA), 2011 Symposium on
Conference_Location :
Shenzhen
Print_ISBN :
978-1-4673-1075-8
DOI :
10.1109/SPAWDA.2011.6167224
