Convex hull method of acoustic field interpolation.

Abstract

Empirical knowledge of the local acoustic field typically comes in the form of time samples at discrete points in space corresponding to the locations of, say, omnidirectional microphones or hydrophones on an underwater array. To determine the acoustic field at an arbitrary point in space requires either propagation modeling, signal interpolation, or some combination of the two. In this paper, a method of field interpolation is presented which estimates the acoustic field at any point within the convex hull of all sample points. This method is compared against more traditional inverse beamforming methods using both simulated and measured data.