Abstract
Time-difference-of arrival (TDOA) methods are well established and commonly used to localize sound sources in bioacoustic applications. TDOA methods generally require/assume that the receivers of the acoustic array are time-synchronized. Time synchronization can be achieved in various ways, including by connecting the receivers to a common data aquisition device, or by using control/calibration sources of known location to time synchronize. In this talk, we introduce a TDOA approach that can be used with an array of autonomous, asynchronous receivers. The approach requires that multiple sources are detected over the array, and localizes the sources simultaneously in addition to solving for clock offsets between the receivers. This approach offers potential cost and time savings since it can be used with autonomous receivers and since it does not require control/calibrationsources. Simulation results will be used to illustrate and explore the approach, and results from an experiment using asynchronous microphones will be presented. [Work supported in part by ONR.]
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