Calculation of sound propagation in three-dimensional field with constant cross section by Duhamel's efficient method using transient solutions obtained by finite-difference time-domain method
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In this paper, a method of calculating transient responses in a three-dimensional (3-D) sound field with constant geometry along the longitudinal direction is described. In the presented method, two-dimensional (2-D) solutions obtained from the finite-difference time-domain method are applied to the efficient calculation procedure to transform the 2-D solution into the 3-D solution proposed by Duhamel. In order to confirm the validity of the presented calculation method, the insertion loss of two types of barriers is analyzed and the calculation results are compared with experimental results obtained from a scale-model experiment.
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