Abstract
Sound intensity vectors can be decomposed into irrotational and curl components. The irrotational part describes intensity propagation, and the curl component vortices and near field of sources. To predict power flow one can limit the problem to irrotational intensity, that is to say to the determination of intensity potential. The resulting equation is analogous to heat transfer, permitting one to use standard heat transfer solvers to predict acoustic power flow. The intensity potential approach is presented for acoustic propagation from sources in cavities with apertures. The modelization of absorbing materials through thermal convection factor is discussed. Finally, comparison with exact prediction and experimental results are presented.
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