Source localization in the atmosphere by means of beamforming and tomography

摘要

This paper reviews progress made during the past decade for localizing audible-frequency-range sound sources in the atmosphere. The main techniques are array beamforming and tomography. Beamforming has been successfully demonstrated for both ground vehicles and aircraft. Tomographic methods are still in an exploratory stage, but have the potential advantage of providing simultaneous characterization of the atmosphere. Beamforming and tomography are similar in that both use time delays between signals recorded at a dispersed set of microphones. In this paper, we pay special attention to the limitations the propagation medium (the atmosphere) places on beamforming and tomography.