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학술지 Screen-Based Sports Simulation Using Acoustic Source Localization
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서상우, 윤소미, 김명규, 성만규, 김예진
Applied Sciences, v.9 no.15, pp.1-15
18KS1200, 청소년용 실감 체험형 스포츠 통합플랫폼 기술 개발, 김명규
In this paper, we introduce a novel acoustic source localization in a three-dimensional (3D) space, based on a direction estimation technique. Assuming an acoustic source at a distance from adjacent microphones, its waves spread in a planar form called a planar wavefront. In our system, the directions and steering angles between the acoustic source and the microphone array are estimated based on a planar wavefront model using a delay and sum beamforming (DSBF) system and an array of two-dimensional (2D) microelectromechanical system (MEMS) microphones. The proposed system is designed with parallel processing hardware for real-time performance and implemented using a cost-effective field programmable gate array (FPGA) and a micro control unit (MCU). As shown in the experimental results, the localization errors of the proposed system were less than 3 cm when an impulsive acoustic source was generated over 1 m away from the microphone array, which is comparable to a position-based system with reduced computational complexity. On the basis of the high accuracy and real-time performance of localizing an impulsive acoustic source, such as striking a ball, the proposed system can be applied to screen-based sports simulation.
Acoustic source localization, Delay and sum beamforming, Impulsive sound, Microelectromechanical system, Screen-based sports simulation
KSP 제안 키워드
Adjacent microphones, Computational complexity, Control Unit, Delay and Sum Beamforming, Direction estimation, Effective field, Estimation Technique, Field Programmable Gate Arrays(FPGA), High accuracy, Impulsive sound, Micro controller unit(MCU)
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