Table 1.
Reverberation times in the reverberating room at different frequencies

Frequency (Hz)	T1 (S)	T2 (S)	αs
100	16.94	9.89	0.14
125	14.23	7.30	0.20
160	12.96	4.83	0.35
200	12.68	4.18	0.52
250	13.75	4.34	0.55
315	12.57	3.36	0.69
400	11.38	3.11	0.72
500	9.99	2.86	0.77
630	8.72	2.48	0.89
800	8.10	2.37	0.93
1000	7.47	2.20	0.97
1250	6.24	2.10	0.98
1600	5.57	2.07	0.92
2000	4.81	1.93	0.92
2500	3.84	1.82	0.88
3150	3.08	1.64	0.85
4000	2.42	1.43	0.82
5000	1.82	1.20	0.77

Notes: T₁: Reverberation time in the empty room,
T₂: reverberation time after installing the specimen.