Diffusorblox Acoustic Data

Absorption Co-efficients

dbl_ac

Hz	Slotted and unfinished, stained or lightly painted NRC: 0.85	Non-slotted and unfinished, stained or lightly painted NRC: 0.75	Slotted and fully sealed NRC:0.41	Non-slotted and fully sealed NRC:0.40
100	0.95	0.61	1.02	0.61
125	0.98	0.66	0.76	0.66
160	0.83	0.58	0.70	0.58
200	0.77	0.54	0.60	0.54
250	0.90	0.53	0.51	0.53
315	0.75	0.64	0.49	0.49
400	0.81	0.76	0.50	0.50
500	0.93	0.92	0.57	0.57
625	0.86	0.82	0.52	0.52
800	0.80	0.79	0.40	0.40
1000	0.77	0.77	0.34	0.34
1250	0.82	0.78	0.31	0.31
1600	0.80	0.77	0.28	0.28
2000	0.80	0.68	0.24	0.24
2500	0.81	0.75	0.26	0.26
3150	0.77	0.77	0.26	0.26
4000	0.77	0.76	0.26	0.26

Diffusion Coefficients

dbl_dc

	Diffusion Coefficient
Hz	DiffusorBlox	Reflector
125	0.63	0.67
160	0.61	0.68
200	0.62	0.69
250	0.69	0.69
315	0.65	0.70
400	0.60	0.66
500	0.74	0.62
625	0.80	0.65
800	0.82	0.57
1000	0.71	0.44
1250	0.72	0.39
1600	0.63	0.36
2000	0.70	0.35
2500	0.76	0.30
3150	0.75	0.24
4000	0.74	0.17

Transmission Loss

dbloxTL

The Transmission Loss data are for the 305mm dB12S system, with fiberglass inserts, fully grouted and reinforced. The 200mm db8S was not tested, since this is a veneer block only, not capable of reinforcement, and is typically used in conjunction with a structural wall.

Hz	Transmission Loss (dB)
125	44
160	42
200	42
250	45
315	46
400	51
500	52
625	53
800	57
1000	57
1250	57
1600	59
2000	61
2500	61
3150	63
4000	64

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