This is the simplest way to assign acoustical coefficients to objects. Since every object is on a layer, one can consider each layer a separate material.

To begin assigning materials to layers, first open the Pachyderm Acoustic pallette by entering the command "Pachyderm_Acoustic". Then click on the Materials tab.

To select a layer to assign to, click on the "For Layer" pulldown menu, and click on a layer name.

The box labeled Material Library contains a few material presets. You can select one of these, which will automatically set the coefficients for the selected layer. 

You can also set the absorption and scattering coefficients manually by  dragging the sliders below the material library, which are labeled by octave band.

The first eight sliders refer to the absorption coefficients, which indicate the fraction of sound energy that is absorbed by an object or boundary. The next eight sliders refer to the scattering coefficients, which indicate the fraction of sound energy which is reflected in a non-specular direction upon contact with an object or boundary.

Last Updated (Wednesday, 07 April 2010 20:58)