Proposal of a simplified methodology for reverberation time prediction in standard medium size rooms with non-uniformly distributed sound absorption

Open Access

Table 1

Experimental and prediction (Sabine’s formula) results obtained for the 16 rooms.

Space ID	Volume (m³)	Octave band 500 Hz			Octave band 1000 Hz			Octave band 2000 Hz
		T ₂₀	T – Sabine		T ₂₀	T – Sabine		T ₂₀	T – Sabine
			4 m = 0	4 m = 0.002		4 m = 0	4 m = 0.004		4 m = 0	4 m = 0.007
1	124	0.51	0.53	0.53	0.38	0.33	0.33	0.52	0.34	0.34
2	260	2.33	1.48	1.45	1.85	1.14	1.11	1.49	0.78	0.75
3	88	0.61	0.59	0.59	0.44	0.36	0.36	0.43	0.36	0.35
4	210	0.59	0.62	0.62	0.66	0.39	0.39	0.66	0.39	0.38
5	158	0.75	0.59	0.59	0.72	0.36	0.36	0.65	0.36	0.35
6	176	1.12	0.77	0.76	0.98	0.59	0.58	0.87	0.54	0.53
7	156	0.56	0.60	0.60	0.57	0.37	0.37	0.62	0.38	0.37
8	130	0.61	0.53	0.53	0.50	0.33	0.33	0.51	0.34	0.34
9	117	0.66	0.38	0.38	0.77	0.44	0.44	0.78	0.45	0.44
10	240	1.20	0.65	0.64	1.21	0.63	0.62	1.14	0.65	0.63
11	77	0.52	0.40	0.40	0.81	0.46	0.45	0.69	0.48	0.47
12	220	0.73	0.44	0.44	0.79	0.48	0.47	0.82	0.50	0.49
13	144	0.62	0.40	0.40	0.64	0.46	0.45	0.69	0.48	0.47
14	168	0.86	0.50	0.50	0.80	0.47	0.46	0.73	0.48	0.47
15	150	0.68	0.43	0.43	0.83	0.49	0.48	0.87	0.51	0.50
16	120	0.57	0.38	0.38	0.56	0.44	0.44	0.55	0.45	0.44

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