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Dispersion-Relation-Preserving (DRP) numerical schemes have been used to simulate the acoustic field in long enclosures with branch-like extended features. Different source conditions have been considered and the dimensional aspects of the branched systems have been varied to observe their effects on the development of acoustic field. The high spectral resolution of the used numerical schemes helps to investigate the nature of interference patterns formed and assess the problem at a significantly low time step, where experimental measurements are impractical. The investigated source characteristics include static point source, moving point source with constant and varying velocity and a moving line source with a Gaussian distribution. The presence of multiple frequencies has also been addressed, considering both monochromatic and poly-chromatic sources. This investigation paves way for the frequency manipulation of unwanted signals in enclosures. The noise levels are mapped at various receiver locations to demonstrate the dependence of the formed acoustic field nature on the dimensional parameters of long enclosures, and the possibility of orchestrating the dimensional attributes of the enclosure for optimum noise performance in presence of varying source characteristics has been addressed.
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