Scaling factors with which the energy spectrum for an underwater shock wave can be scaled from one set of conditions (i.e., explosive composition, charge weight, and range) to a second set of conditions are derived. Analogous scaling factors for an ideal acoustic wave are also shown. The spectrum measured at 1 yard from a 1-lb charge is scaled to two other conditions (viz., 100 yards from a 1-lb charge, and 280 yards from a 1.8-lb charge) for which measured values are also available. In both cases the explosion scaling is in agreement with the data whereas the ideal acoustic scaling gives spectrum levels that are too high at the higher frequencies.
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