Steel Test
The following results include barriers being fixed to 1mm 18g steel
Transmission Loss dB|Frequency (Hz)	65	125	250	500	1000	2000	4000
12mm Class O foam, 5kg/m2 lead, 6mm Class O foam	24	23	25	29	33	46	53
12mm Class O foam, 5kg/m2 PVC, 6mm Class O foam	23	19	21	35	44	47	54

Vibration
Duct (D) | Panel (P)
Vibration Level Frequency	65	125	250	500	1000	2000	4000
(D) 900x600 (25mm foam)	-	5.6	6.4	10.0	18.8	15.5	7.1
(P) Max 1.800 x900 - Min 1.210 x 600 (12mm)	-	7.1	9.8	14.9	13.1	10.7	3.1
(P) Max 1.800 x900 - Min 1.210 x 600 (25mm)	-	12.3	12.0	15.4	21.4	17.5	11.3
(P) Max 1.800 x900 - Min 1.210 x 600 (50mm)	-	15.5	12.9	21.0	25.4	19.6	12.4