Abstract
The maximum likelihood bearing estimator has been simulated on a computer and has been used to examine the effects on performance of both environmentally imposed conditions and system parameters. The imposed conditions include source spectra, ambient noise spatial character, wind, temperature, and array tilt due to terrain. The system parameters include microphone position error, channel amplitude match, channel phase match, operating frequency band, number of microphones, size of array, number of azimuth bins, and number of delay line taps. The results of this study indicate that a passive acoustic bearing estimation system for ground sources should be able to achieve an accuracy of a few degrees under most conditions.
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