Abstract:
For detecting and localizing gunshot sound, distributed acoustic sensors with various baseline separations (several meters to dozens of meters) are used in our field experiments. The large baselines of the distributed sensor networks, based on the time difference of arrival method, provide improved localization accuracy and have distinct advantages over small arrays. Results are reported and compared for various baseline separations, detection distances, numbers of sensors, and weather conditions. The sound source used is a propane cannon. Several least squares methods are used in the data analysis and source localization. Results from the experiment are presented and discussed. The localization errors are analyzed as a function of combined error sources (GPS, timing, weather, etc.). Possible ways to improve the localization accuracy are suggested. [Research supported by the U. S. Army TACOM‐ARDEC at Picatinny Arsenal, NJ.]