ABEC combines boundary and lumped element methods. Complicated acoustics is calculated with the help of BEM. Simple acoustics, structures and electronics is handled by the LEM.
ABEC stands for Acoustic Boundary Element Calculator. ABEC directly solves the Helmholtz Integral for the interior and exterior radiation problem. It's all acoustics, no mechanics. The integral is solved by decomposing the structure into triangles assuming constant pressure on each finite element.
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