Abstract
The R-SNAP and BiStaR normal mode-based reverberation models are used to solve a selection of problems from the 1st Reverberation Modeling Workshop held in Austin, TX in November of 2006. R-SNAP and BiStaR are codes that include the effects of inter-mode decorrelation to predict the coherent aspects of reverberation, as well as allowing for the option to compute the ‘‘incoherent’’ reverberation. Comparisons between the incoherent R-SNAP and BiStaR predictions and model predictions obtained by other methods show good agreement. However, it is argued here that as defined, the problems require a coherent solution, and differences between the incoherent and coherent solutions can be significant. Comparisons with coherent 2-way PE results for problem I computed by Joe Lingevitch (NRL) show that coherent structure in reverberation exists, is predictable, and should therefore be an integral part of any reverberation calculation. [Work supported by ONR.]
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