Table 1

Example of acoustical parameters for omni source calculated in virtually reconstructed Epidaurus with audience, using four different source positions and 20 receiver positions. Average and standard deviation of each parameter are presented. All results are for the 1 kHz octave band.

Parameter Source pos. A
Source pos. B
Source pos. C
Source pos. D
  Avg. SD Avg. SD Avg. SD Avg. SD
EDT (s) 3.34 2.09 1.22 0.21 0.21 0.03 0.14 0.04
ξ (EDT) (‰) 635 277 564 150 113 40 110 55
T20 (s) 0.66 0.19 0.59 0.07 0.80 0.06 0.89 0.15
ξ (T20) (‰) 162 142 101 42 75 25 95 34
T30 (s) 0.68 0.05 0.76 0.12 0.89 0.08 0.9 0.06
ξ (T30) (‰) 52 18 53 26 31 25 39 23
Curvature, C (%) 7 21 30 19 13 12 4 16
Strength, G (dB) −5.3 6.3 −5.4 3.7 −5.9 3.1 −7.4 3.2
Efficiency, E (dB) 1.8 0.7 4.6 0.5 6.4 0.3 5.8 0.5
D 50 0.77 0.12 0.70 0.09 0.95 0.01 0.96 0.01
C50 (dB) 6.3 4.6 3.9 2.2 12.9 0.8 14.4 1.4
C80 (dB) 6.4 4.6 12.6 2.4 16.2 0.5 16.8 1.3
TS (ms) 29 14 24 7 16 1 12 1
Echo – Dietsch 1.87 0.36 1.45 0.19 0.43 0.08 0.49 0.14

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