Concert halls, theaters and churches are complex spades and therefore require a computacional acoustical model to study the acoustics inside the room.

This acoustical model can predict the acoustics of large spaces dedicated to speech or music. as shown below:

With this acoustical model it is possible to predict several parameters such as:

Reverberation Time extrapolated from T20 ,T30
Sound Pressure Level across the room
Clarity C50 and C80 and Definition D50
Lateral Fraction
Speech Intelligibility

Prediction formulas such as Sabine or Eyring Equation and other numerical approaches can provide several errors when determining the acoustics inside a space. Only a computacional model can accurately predict the acoustics inside a room.

CATT/TUCT is widely known as one of the top software for acoustical predictions