Noise Barriers Product Reference Guide

QuietMod: STC and NRC Comparison
NVLAP INDEPENDENT 3 rd PARTY TEST RESULTS
LAB Panel Test Date Test Number 31.5Hz 63Hz 125Hz 250Hz 500Hz 1KHz 2KHz 4KHz 8KHz STC
Hard/Perf Panels with Septum: Reflective One Side – Absorptive One Side
RAL H/P/S-43 12/5/2014 TL14-434 20 23 27 32 40 50 58 64 64 43
RAL H/S/P-52 12/1/2014 TL-14-426 27 20 31 45 48 55 59 65 61 52
USG H/P-55 1/26/2016 USG-160137 25 20 31 45 53 58 61 63 59 55
USG H/P-55 1/25/2016 USG-160132 -- 0.74 0.15 0.37 0.77 0.96 0.97 0.86 0.95 0.75
USG H/S/P-57 1/26/2016 USG-160136 25 20 35 47 54 60 62 63 61 57
USG H/S/P-57 1/25/2016 USG-160134 -- 0.25 0.1 0.34 0.71 0.93 0.98 0.89 0.95 0.75
Double Wall Construction: Both Walls Reflective, 4” Airspace Between Panels
RAL H/H-59 8/18/2004 -- -- -- 43 45 56 66 67 77 -- 59
RAL H/S/P-61 12/1/2014 TL14-427 17 31 42 48 59 65 67 71 70 61
USG Double-69 2/2/2016 USG-160204 -- 28 51 56 67 75 75 78 75 69
AT Double-70 11/21/2014 -- 27 35 55 61 66 73 86 87 86 70
Note: STC Tests do not include data for 31.5Hz, 63Hz or 8KHz. We intentionally included data for those frequencies on our most recent tests.
ACOUSTICAL COMPARISON
QuietPerf Absorption Panels
Product Thick Fill Test
Date
Lab 100 125 160 200 250 315 400 500 630 800 1K 1.25K 1.6K 2K 2.5K 3.1K 4K 5K NRC
V-Groove 2.5” - 4/8/04 RB 0.32 0.46 0.51 0.78 0.86 1.18 1.30 1.36 1.32 1.27 1.20 1.17 1.09 1.03 0.97 0.88 0.83 0.74 1.10
NB-II 2” - 2/4/08 RB 0.34 0.27 0.32 0.46 0.63 0.96 1.03 1.09 1.08 1.06 1.06 1.05 1.03 1.04 1.01 1.02 1.03 1.02 0.95
NB-III 3” - 2/4/08 RB 0.40 0.87 0.99 1.27 1.26 1.31 1.27 1.18 1.12 1.06 1.04 1.07 1.06 1.08 1.07 1.04 1.00 0.96 1.15
NB-IV 4” - 1/25/16 USG 0.12 0.13 0.50 0.94 0.91 1.21 1.25 1.15 1.16 1.09 1.07 1.02 1.01 0.99 1.01 0.98 0.99 0.96 1.05
NB-II 2” - 2/3/06 RB 0.12 0.29 0.23 0.43 0.59 0.79 0.91 1.05 1.07 1.09 1.08 1.05 1.04 1.03 1.04 1.01 1.02 1.02 0.95
NB-II 2” Bag 2/3/06 RB 0.28 0.47 0.37 0.52 0.65 0.80 0.90 0.96 1.01 1.02 1.03 1.00 0.98 0.94 0.87 0.80 0.76 0.69 0.90
NB-IV 4” - 2/3/06 RB 0.55 0.96 0.88 1.04 1.08 1.17 1.24 1.16 1.11 1.09 1.07 1.08 1.07 1.07 1.07 1.05 1.03 1.04 1.10
NB-IV-B 4” Bag 2/3/06 RB 0.56 0.95 0.68 0.77 0.83 0.86 0.91 0.96 0.95 0.97 0.98 1.00 1.00 0.99 0.93 0.85 0.79 0.73 0.95
QP-2 2” - 8/15/07 RB 0.24 0.25 0.33 0.48 0.65 0.91 0.96 1.06 1.12 1.11 1.13 1.15 1.11 1.11 1.07 1.06 1.06 1.02 1.00
QP-2 2” * - 8/15/07 RB 0.33 0.39 0.41 0.61 0.70 0.99 1.08 1.23 1.26 1.24 1.20 1.21 1.15 1.16 1.13 1.09 1.12 1.06 1.05
QP-4 4” - 8/15/07 RB 0.58 0.88 1.00 1.06 1.16 1.37 1.39 1.34 1.40 1.31 1.25 1.25 1.21 1.20 1.18 1.13 1.13 1.09 1.25
QP-4 2” * - 8/15/07 RB 0.73 0.94 0.98 1.28 1.31 1.50 1.46 1.43 1.44 1.33 1.29 1.28 1.28 1.26 1.22 1.19 1.20 1.15 1.30
*=Airspace