Acoustic performance

Measurement according to international standard ISO 11654 and US standard ASTM C 423.

Arcolis^® one-sided panels, 1200 x 600 mm, placed directly against the wall or fixed directly to the ceiling (Acoustics test reports available on request).

Sound absorption coefficient α_p

Frequency (Hz)	α_ρ [-]
125	0.35
250	0.90
500	1.00
1000	1.00
2000	0.90
4000	0.90

Sound absorption coefcient α_s according to ASTM C423

Fréquence (Hz)	100	125	160	200	250	315	400	500	630
α_s [-]	0.19	0.27	0.53	0.77	0.96	1.03	1.09	1.06	1.12

Fréquence (Hz)	800	1000	1250	1600	2000	2500	3150	4000	5000
α_s [-]	1.05	0.97	0.93	0.91	0.90	0.96	0.89	0.87	0.90

Measurement of the equivalent absorption area according to standard ISO 354.

12 Arcolis^® double-sided baffles, 1200 x 1200 mm. Suspended vertically, with 500 mm spacing (Acoustics test reports available on request).

Equivalent sound absorption area per element A_obj

Frequency (Hz)	100	125	160	200	250	315	400	500	630
A_obj [m²]	0.31	0.37	0.60	0.86	0.93	1.16	1.28	1.44	1.55

Frequency (Hz)	800	1000	1250	1600	2000	2500	3150	4000	5000
A_obj [m²]	1.67	1.59	1.64	1.53	1.57	1.52	1.51	1.59	1.63