In the Sound Field Calculations CARA determines the Sound Pressure Level for 118 frequencies between 5 and 40,960 Hz at about 1,000-3,000 locations equally distributed within your sound room. The steady state wave pattern results from a superposition of standing sound waves. These results are represented in 3D by the module ETS3DView. The graphic representation can be moved, twisted, scaled, animated, and the color scale may be adjusted to your personal taste.

The picture to the left displays the Steady State of the Sound Pressure Distribution in a non rectangular room excited by five loudspeakers (surround configuration) at a frequency of 86.4 Hz.

The positions of the loudspeakers (B:1 ... B:5) are marked by blue pins. The yellow pin marks the current listening position.

You clearly identify zones of 'constructive' interferences of sound waves ('ridges' in yellow to red/brown colors) and those of 'destructive' interferences ('valleys' in green to blue colors).

The sound waves of the Direct Sound and the Diffuse Sound (reflections at the room walls) superpose each other resulting in the presented pattern. At certain listening places the 86 Hz tone is nearly not to be heard (blue color), whereas in the red/brown zones the sound volume of this tone is very high.