Abstract
Updated information on system characteristics and underwater explosive parameters and new theoretical/empirical models have provided new insights into measurements of source levels of small TNT charges at shallow and moderate depths. Preliminary results, for the shock wave from a 3-lb charge of TNT, were presented at an earlier meeting of the Acoustical Society. In that paper, comparison with Weston's theoretical values showed differences of 2.5 to 5 dB. New evaluations of Weston's formulations, based on improved values of explosive parameters, show greatly improved comparisons and support measured values. Source levels for shock wave, bubble pulses, and entire wave train are presented for 3-lb charges detonated at 60−, 500−, and 1000−ft depths and compared with measurements of Weston and Stockhausen and later values from Bell Laboratories, Naval Ordnance Laboratory, Sac Lant ASW Research Center and Defence Research Establishment, Atlantic. To complete the survey, values from models of Weston, Christian, Gaspin and Shuler, and NUSC are included.
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