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ABEC stands for Acoustic Boundary Element Calculator with sub-domain modeling. 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. ABEC supports sub-domain modeling. In this mode the total structure is split into several domains. The solving happens in two stages. First, each sub-domain and subsequently, the total system is solved. Sub-domain modeling is powerful for larger acoustic systems, such as vented loudspeaker enclosures or horns, for example. In BEM it is the only way to deal with the Infinite Baffle radiation. ABEC standard mode is 3D but also supports the axis-symmetric model.
ABEC is quite simple to use, but rudimentary at the input. The structure is entered via a script similar to other finite element programs. ABEC will auto-mesh the structure in order to satisfy the frequency-criterion. ABEC comes with a 3D-OpenGL viewer, which displays the structure and the field as contour maps.
After the solving stage, the response can be observed immediately. Sound pressure fields can be displayed as contours inside ABECs viewer. Spectral response curves at any point in space or the directivity can be calculated and rendered with the help of our graphic engine Vacs or VacsViewer.
Currently, the software ABEC is in development. However, part of it is already up and running and provides promising results. If you like, you are invited to take part in testing ABEC, which you can download at our download-page.
At a later stage, a commercial version will follow, which allows for additional functions and for saving the solved structure.
Many thanks to Jonathan Sheaffer who provides a Sketchup ® - modeler especially dedicated to room acoustics.
The Readme.txt file shows the log of recent developments. The current version is 0.7.7 b2 of 27.05.2009.
For reporting suggestions, wishes and bugs, please follow here...
Copyright © Joerg Panzer
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