ERATO Proceedings Istanbul 2006.pdf - Odeon

4.2 Reverberation Time T 30 vs. Frequency
2,50
Aspendos Theatre: T 30 vs. Frequency
2,00
T30(s)
1,50
1,00
0,50
0,00
63 125 250 500 1000 2000 4000 8000
Frequency (Hz)
Aspendos Roman Empty
Aspendos Roman Full
Aspendos Present Empty
Aspendos Present Full
Aspendos Present Stage Empty Aspendos Present Stage Full
Figure 3. Calculated reverberation time T30 as a function of frequency in different configurations of Aspendos Theatre.
The parameter values are averaged over all source-receiver positions.
We see in Fig. 3 that for the Aspendos theatre in present state, the modern stage provides a decrease
of reverberation time at mid-frequencies, and in the case of the Roman reconstruction (with added
velum and stage canopy) there is only minor difference in reverberation.
From Table 1 it is seen that in Jerash theatre the reconstruction of mainly the frons scaenea results in
an increase of the reverberation time of around 0,3 s. It is also seen that the Syracuse theatre in the
Roman era had around 0,6 s longer reverberation than in the present stage. This is mainly due to the
frons scaenae but also the colonnade provided some reverberation.
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