The 2nd Round Robin on Room Acoustical Computer Simulations was made in the Elmia Concert Hall. This demo shows the agreement beween measurements and simulations made in Odeon 9.1. A concert halls is one type of auditorium. Other auditorium cases could be churches, mosques, opera halls, lecture halls or music studios. See below the example for Odeon features.
Odeon features for auditorium acoustics
| Features |
Benefits |
| Simulation of reverberation time measurements in selected positions as in ISO 3382 |
The reverberation time is calculated from the squared impulse response method |
| Room acoustic parameters according to ISO 3382 are calculated |
Objective descriptors of the following listener aspects: level of sound, reverberance, clarity of sound, apparent source width, and listener envelopment |
| Stage parameters according to ISO 3382 are calculated |
Used for characterising the ensemble conditions and the perceived reverberance for musicians on the stage |
| Calculated STI (Speech Transmission Index) |
Objective descriptor of the speech intelligibility in a listener position taking the reverberation and background noise into account |
| Global reverberation time estimate |
Very fast and accurate, takes into account the room geometry and the distribution of absorption materials and surface scattering |
| Mapping of room acoustic parameters in grids |
Overview of sound distribution; easy to localise hot spots |
| The impulse response in a single position can be displayed and analysed in reflectogram and 3D reflection path |
The analysis in time and space is an efficient tool for optimising early reflections in an auditorium |
| Source directivity can be applied; the user can easily create new source directivity data |
Loudspeaker data can be applied using the open CLF (Common Loudspeaker Format), which is supported by many loudspeaker manufacturers |
| Visualzation of reflections from selected surfaces, e.g. reflector panels |
A 3D tool for design of reflectors |
