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