ERATO Proceedings Istanbul 2006.pdf - Odeon

The Aspendos theatre has a maximum diameter of about 98 m and it is 26 m high at the top of the
gallery. The slope of the cavea is 33° and the seating capacity is estimated in about 15000
spectators.
Unfortunately, during the acoustical measurements, a modern stage was set up in the orchestra to be
used for a dance performance. This structure had the back wall made of mirrors, which inevitably
produced a marked reflection in some of the source-receiver position. Analyzing the acquired
impulse responses and comparing the acoustical parameters also with those acquired in other
theaters, we could verify that the sound field was not greatly altered and the measurements results
are valid anyway.
2.2 The Jerash Theatre
Figure 1. Aspendos Theater
The Jerash theatre is situated in Jordan, north of Amman. Only one of the stage wall storeys remains
today but the cavea is almost totally conserved. The Jerash theatre has not trace of a covered aisle in
the upper part of the cavea as it is in Aspendos, but there is a 1.5 m high stage in front of the skene.
The theatre has a diameter of about 63 m and it is 20 m high at the top of the cavea. The cavea slope
is 43° and about 5000 people can sit on its tiers of steps.
Figure 1. Aspendos Theatre
3 MEASUREMENTS SETUP
For both the measurements campaigns the same measurements setup was utilized. Two different
types of microphone, useful both to measure the acoustical parameters and to acquire signals for
different auralization techniques were used to record the impulse responses: a B-format microphone
Soundfield ST250 and a binaural probe Neumann KU100. The first microphone give as output
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