Localization and source assignment of blast noises from a military training installation

Time differences of arrival (TDOA) are often sufficient data for localization of a sound source with a sensor array. We consider the problem of localizing multiple impulsive sound sources that occur on a military installation having live-fire training exercises, using a dozen or more noise monitors as a large array. In this setup, though, sounds from multiple events can arrive in different order at different monitors. When multiple sources are operating, ambiguous source-detection assignments degrade the localization estimates. By minimizing a global cost-function on the entire detection catalog, we resolve source-detection assignments and improve the localizations. We outline an estimator and show results with simulated data and field measurements.