Effects of sound absorbing facades on the acoustical quality in different simulated inner courtyard situations

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Table 3

Results of the room acoustical measurements in the inner courtyard M for the eight measured source-receiver combinations in comparison to the corresponding simulated values.

Transmission path	S1-E1	S1-E2	S1-E3	S1-E4	S2-E1	S2-E2	S2-E3	S2-E4
T₂₀ Meas. in s	2.64	2.63	2.68	2.74	2.37	2.33	2.65	2.73
T₂₀ Simul. in s	2.64	2.57	2.73	2.66	2.49	2.39	2.65	2.57
T₂₀ Difference in s	0.00	−0.06	0.05	−0.08	0.12	0.06	0.00	−0.16
T₂₀ Difference in %	0	−2	2	−3	5	3	0	−6
EDT Meas. in s	0.15	2.63	1.45	2.43	0.29	0.72	1.64	1.05
EDT Simul. in s	0.27	2.61	2.84	2.78	0.49	0.88	3.88	1.92
EDT Difference in s	0.12	−0.02	1.39	0.35	0.20	0.16	2.24	0.87
EDT Difference in %	80	−1	96	14	69	22	137	83
G Meas. in dB	10.3	3.1	8.9	2.5	11.5	10.7	7.8	6.7
G Simul. in dB	7.6	0.9	6.1	−0.8	8.4	8.3	4.0	5.0
G Difference in dB	−2.7	−2.2	−2.8	−3.3	−3.1	−2.4	−3.8	−1.7
STI Meas.	0.64	0.56	0.59	0.57	0.62	0.58	0.6	0.61
STI Simul.	0.85	0.61	0.84	0.54	0.83	0.78	0.76	0.69
STI Difference	0.21	0.05	0.25	−0.03	0.21	0.20	0.16	0.08
EK Meas.	0.77	0.71	0.73	0.63	0.62	0.63	0.64	0.55
EK Simul.	0.74	1.07	0.74	0.62	0.57	0.55	0.64	0.75
EK Difference	−0.03	0.36	0.01	−0.01	−0.05	−0.08	−0.01	0.20

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