Remote Netted Acoustic Detection System: Final Report.

A Remote Netted Acoustic Detection System RNADS has been developed at the U.S. Army Research Laboratory for the detection of ground and air targets in a typical battlefield environment. The system involves non-line-of-sight NLOS, real time x-y coordinate tracking, detection, and classification of targets at tactical ranges. The acoustic detection system includes a set of microphone arrays, surveyed a few kilometers apart and networked together through a radio link. Each microphone array is connected to a signal processing box that determines the line of bearing LOB, frequency, time, signal to noise ratio SNR, and classification of detected targets. The data from each sensor array are transmitted to a central processing station, where a multiple hypothesis tracking MHT algorithm and a Kalman filter tracking algorithm are used to calculate and track the real time x-y coordinates of detected targets. The information is in turn overlayed on a digitized map of the terrain. A series of field experiments was conducted to evaluate the performance and capability of the system.