Noise Barriers, LLC. Providing the Sound of Silence

Sound Control Window Systems

Acoustical Performance Data
Sound Transmission Loss Data, dB

1/3 Octave Band Center Frequency, Hz	100	125	160	200	250	315	400	500	630	800	1K	1.25K	1.6K	2K	2.5K	3.15K	4K	5K	STC
Model U
U-4-43	25	27	28	32	36	36	39	40	43	45	50	52	49	41	41	46	52	55	43
U-11-51	37	36	37	36	40	42	46	47	51	55	57	59	57	54	57	58	59	59	51
Model HM
HM-BRG-8-48	40	37	36	40	44	44	46	47	49	50	45	44	46	52	55	54	53	56	48
HM-11-53	39	34	40	39	43	46	51	52	53	55	54	54	57	60	64	66	67	67	53
HM-11-54	38	38	38	42	45	47	49	49	53	55	55	57	58	59	57	58	59	59	54
Model SF
SF-11-57	-	42	43	48	48	52	54	55	56	54	53	57	58	59	59	61	62	-	57
All tests performed by Riverbank Acoustical Laboratories, an independent NVLAP accredited acoustical testing facility. The test method conforms with ASTM Designations E90-02 and E413-87.