Assessment of strong reflections in ancient theatres: Spatial information from parallel measurement data

The sound field in ancient open‐air theatres shows a finite time‐response in a transient. The structure of the time‐response depends on geometrical characteristics of the theatre and source‐receiver position: upon geometry dimension of the stage area its possible to observe nearly strong reflections and quantify the associated delay time. Sampling the theatre space with a single microphone does not allow any directional information on the sound field but the parallel use of more microphones and software post‐processing could add spatial information. Dataset consists of four syncronized impulse response measured along a radial direction in the theatre plan for differents source positions. A directional receiver system based on a post‐processing method has been implemented and applied to measurement data. The obtained experimental results are reported and discussed.