This article will explain how to run simulations in pachyderm.

1. Make sure all modeling prerequisites are met:

-- The model is finished and airtight.

-- All surfaces have absorption and scattering coefficients assigned (either by object or by layer)

-- There is one source and at least one receiver located appropriately in the model

2. Go to the 'Impulse' tab of the pachyderm user interface. To load the pachyderm user interface, type "Pachyderm_Acoustic" into the command line. The 'Impulse' tab is the first tab of the control that appears.

3. Make settings selections. A few kinds of simulations are possible using this control. Please see 'Selecting Simulation Settings' for more information.

4. Verify that all environmental factors are accounted for. The default values are a common and accepted norm for performance spaces:

  • 20 degrees C
  • 50% relative humidity
  • 1000 hecta-Pascals static air pressure

The default method for calculating air attenuation is according to ISO 9613-1.

5. If all of the above are finished and correct, it is time to run your simulation. Click the 'Calculate Solution' button at the bottom of the form.

Once the above steps are completed, the Rhinoceros interface will stop for a second, while Pachyderm gathers the scene data, and enters it into a spatial partition (for efficiency). If windows claims that the software has become unresponsive, don't panic! The more complex the model, the longer the partitioning phase will take. Please give pachyderm a couple of minutes to finish partitioning the model. Once it has completed, the Rhinoceros interface will become live again, and the simulation will begin. You will begin to see messages like the following appear on the command prompt: