Concert halls usually require computer model to be created to study the acoutics inside the room.

At our company we can create a model using the professional software CATT/TUCT that can be used to study several parameters in different locations inside the room such has:

Reverberation Time
Sound Pressure Level
Clarity and Definition
Lateral Fraction (Spatial Awareness)

Prediction formulas such as Sabine can provide several errors when prediction the acoustics inside a space.