The prediction of noise radiated by piping downstream of a control valve is subject to various uncertainties. One of the significant sources of uncertainty is the pipe-wall transmission loss. Due to the difficulties in experimentally measuring pipe-wall transmission loss accurately, and practical difficulties of taking into account pipe length and boundary conditions, an analytical/numerical approach for the calculation of transmission loss is required. The feasibility of coupled structural-acoustic finite element based calculations of transmission loss is being investigated for this purpose. This should also assist in the refinement of analytical/statistical calculations of transmission loss and noise radiation.
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