Experimental Evaluation of Gaussian and Gaussian-Hermite Beam Theories as Tools for Modeling Scanned Ultrasonic Measurements

摘要

Presented here are the experimentally determined radiation fields of focussed and unfocussed piston tranducers radiating through both planar and cylindrical liquid-solid interfaces at both normal and non-normal incidences. Comparisons are made with the fields predicted by the Gaussian and Gaussian-Hermite theories. The theories are shown to work well within the limits of the assumptions made and within the range of the cases studied. Also presented is a comparison of experimentally determined probability of detection (POD) curves with those predicted by a POD theory which utilizes the Gaussian beam theory. (ERA citation 12:009685)