Transmission Loss & Absorption Co-efficiency Data

 

Acoustic Data Transmission Loss db
 

Frequency Hz	63	125	250	500	1000	2000	4000
Laminate 5kg/m5 19mm thickness L.5.1.12.6 12mm Class O foam, 5kg/m5 lead, 6mm Class O foam.	16	17	21	25	32	39	44
Laminate 10kg/m5 19mm thickness L.10.1.12.6 12mm Class O foam, 10kg/m5 lead, 6mm Class O foam.	20	19	23	26	28	39	50
Laminate 5kg/m5 33mm thickness L.5.1.25.6 25mm Class O foam, 5kg/m5 lead, 6mm Class O foam.	18	21	35	38	48	52	53
Laminate 10kg/m5 33mm thickness L.10.1.25.6 25mm Class O foam, 10kg/m5 lead, 6mm Class O foam.	22	23	37	39	48	52	59

Absportion Coefficient ISO (Random Incidence) Frequency HZ
Frequency Hz	125	250	500	1000	2000	4000	NRC
Laminate 19mm thickness Absorption Coefficient	0.08	0.14	0.22	0.32	0.40	0.53	0.27
Laminate 33mm thickness Absorption Coefficient	0.08	0.20	0.56	0.93	0.84	0.92	0.63