Abstract
Vector sensors detect and localize sources of radiated or scattered sound by simultaneously measuring pressure and particle motion near a single point. Experiments have revealed that the devices have remarkable localization capabilities greatly exceeding resolution limits predicted from considerations of diffraction effects caused by the device aperture. Fluctuations in the imaged position of a distant point source appear to result from inhomogeneities in the non-ideal (water) medium. These fluctuation effects can be mitigated by data averaging until limits imposed by statistical non-stationarity of the medium are reached. In this talk, experiments measuring the fluctuation of point source images will be described and a theory of the resolution achievable by vector sensors will be presented.
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