Auditoriums

The 2^nd Round Robin [1] on Room Acoustical Computer Simulations was made in the Elmia Concert Hall in 2000. The demo shows the agreement beween measurements and simulations made in ODEON 9.1. A concert halls is one type of auditorium. Other auditorium cases [2] could be churches, mosques, opera halls, lecture halls or music studios. See below the example for ODEON features.

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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