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Chapter 7 - Calculation Procedures

The calculation procedures implemented in CadnaR are all used to predict the local level or the spatial level distribution inside rooms. All procedures have their own prerequisites and restrictions and are, therefore, suitable for different tasks. On the other hand, using the results obtained by the different procedures may enable a combined assessment of a given situation.

In principle, all calculations in CadnaR make use of multi-threading (parallel threads on multi-core processors) with the following features:

  • calculation procedure "Image Sources": The diffraction calculation makes use of multi-threading. The calculation of reflection is single-threaded (i.e. using a single core).
  • calculation procedure "Particles": The calculation makes use of multi-threading. Furthermore, you can take advantage of the parallel computing power of a GPU (Graphic Processing Unit, see „Particle Model“ tab).

Note

For the combined procedure "Image Sources --> Particles" the above statements hold for each part respectively.

  • calculation procedure "Diffuse Field (statistical)" and "VDI 3760": The calculations are single-threaded.

In this chapter, for each calculation procedure implemented in CadnaR the basic assumptions and the principle calculation methodology are explained. Regarding the calculation procedures „Image Sources“ and „Particles“, additional application notes with respect to the configuration options are given.