Developments in Ceramic Materials Research

166
where D, , V
Dimitris Skarlatos, Tilemachos Zakinthinos and Ioanis Koumanoudis
i δ i i the energy density, the damping constant and the volume of the i th
room,
S is the wall aperture area between the rooms i and j
ij
n res the number of resonators of the i th room.
A computer simulation program for a system of 11 coupled subspaces, showed that in
order to achieve remarkable effects on the acoustics of a church a large number of pots is
required [49]. This number is relative to the church volume. A reduced reverberation times in
each subspace was observed [1], [2].An other effect is a decrease on EDT and an increase on
Clarity and Definition. Figure 21 shows the calculated effect of the number of resonators per
unit volume at resonance, under optimum conditions to the above mentioned indexes.
EDT (s)
Clarity (C80)
2
1.8
1.6
1.4
1.2
1
0.8
0.6
0.4
Effect of resonators on EDT
0.2
0 0.2 0.4 0.6 0.8 1 1.2
Resonators per unit volume
20
18
16
14
12
10
8
6
4
Effect of resonators on Clarity
2
0 0.2 0.4 0.6 0.8 1 1.2
Resonators per unit volume