EASE Calculations
  For checking a room-acoustical or electroacoustical design by means of calculation, there has first to be constructed a three-dimensional virtual computer model of the room or open space depicting the sources (loudspeakers or natural sources) and the situation of the audience areas or indvidual listeners' seats. Herewith the resolution of the model varies in quality, depending on the type of problem to be solved. For a sound-reinforcement design 300 to 800 faces are sufficient in most cases, but for saving calculation time the smaller numbers should be preferred. Room-acoustical investigations, however, may require modeling up to 1500 faces (and even more in particular cases). One has to consider, however, that fine surface structures should not be modeled, since this may lead to frequency-dependent erroneous results. This can be easily avoided by assigning appropriate scattering degrees to smooth surfaces. Herewith the use of AURA is, however, indispensable, since the scattering degrees of EASE4.1 are applied only in AURA.
 
  Wire-frame model of a church nave
  Thereafter the correct assignment of the different absorption degrees to the respective wall surfaces is checked once more in a rendered view. This Standard Rendering Mode (or in this case also the high-resolution Architectural Rendering Mode) allows the model structure to be verified, especially if calculation is to be started subsequently.
 
 

Standard rendering 

 
  Architectural rendering, view into the chancel
 
  Architectural rendering, view into the gallery area of the church
  Thereafter calculation can be started. If further postprocessing is not to be carried out, the results are mostly presented in the so-called mapping format. The calculated parameters are indicated either preferably on the selected audience areas or directly on the wall surfaces or at selected listeners' seats. This occurs in a frequency-dependent manner, i. e. in 21 selectable frequency bands
 
  Direct sound level distribution for the 1000Hz third-octave band
 
  Overall sound level distribution for the 1000Hz third-octave band
 
  AlCons distribution for the 2000Hz third-octave band