An important room acoustic measure is the "volume per person" or "volume per seat". It is calculated by dividing the totale room volume by the number of seats.
| room | preferred volume per person | max. volume for natural acoustics |
| Conference Room | 3 - 5 cubic meters | |
| Auditorium, Speech | 4 - 6 cubic meters | 5000 cubic meters |
| Concert Hall | 7 - 12 cubic meters | 25.000 cubic meters |
| Room for Organ Performances | 10 - 14 cubic meters | 30.000 cubic meters |
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