Noise Curtains

by dB Engineering

Quilted Fiberglass Absorbers

Quilted Fiberglass Absorbers

dB Engineering Quilted Fiberglass Absorbers are fire safe, high performance acoustical fiberglass blankets that are used to reduce reverberant (reflected) airborne noise energy in many diverse industrial and architectural applications as well as on original equipment.

They are available as overhead sound absorption baffles, wall panels, in roll form with edges bound or unbound or as die-cut pieces.  An excellent alternative to urethane foams since they are fire safe, exhibit low smoke emissions and possess high mechanical strength.  Additionally, they have a wide range of temperature limits, can be cleaned, and are unaffected by moisture, humidity, dust, dirt, oils and most chemicals.   Flexible quilted absorbers are easily installed, will not degrade and have extremely long service lives.

Gun Range
Our White Quilted Fiberglass Absorbers being used at a gun range.

Flammability Ratings:
Model Numbers Flame Spread Smoke Density Class
Vinyl-coated-fiberglass-cloth faced:
QFA-1, QFA-4, QFA-7
QFA-10, QFA-14, QFA-20
17.67 22.75 1,A
Silicone-coated-fiberglass-cloth faced:
QFA-2, QFA-5,QFA-8
QFA-11, QFA-16, QFA-22
4.95 11.43 1,A
Non-woven porous scrim faced:
QFA-3, QFA-9, QFA-18
5.07 .45 a,A
Flammability Testing per ASTM E-84: "Surface Burning Characteristics of Building Materials"

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Quilted Fiberglass Absorbers Quilted Fiberglass Absorbers Quilted Fiberglass Absorbers Quilted Fiberglass Absorbers Quilted Fiberglass Absorbers  
Acoustical Data:

Sound Absorption Data

Random Incident Sound Absorption
Octave Band Center Frequencies (HZ)

Model No. Normal Thickness 125 250 500 1000 2000 4000 NRC
QFA-1 1 inch .12 .47 .85 .84 .64 .62 .70
QFA-2 1 inch .04 .46 .86 .81 .59 .31 .70
QFA-4 1 inch .17 .30 .83 .82 .59 .37 .65
QFA-7 2 inches .07 .27 .96 1.13 1.08 .99 .85
QFA-10 2 inches .19 .99 .96 .80 .57 .33 .85
QFA-14 4 inches .21 .89 1.09 1.17 1.13 1.07 1.05

Sound Absorption Data

Absorption Coefficients - Sabin/Unit
Octave Band Center Frequencies (HZ)
Model No. Dimensions 125 250 500 1000 2000 4000 NRC
QFA-4 Baffles 2' x 4', 1" th .59 2.43 7.17 8.66 8.82 6.71 6.75
QFA-10 Baffles 2' x 4', 2" th .91 6.07 8.25 8.88 6.65 5.58 7.45
Actual Testing Per ASTM C423-77, C423-81, C423-84A, C423-90A

Examples of Quilted Fiberglass Absorbers in use
QFA-10 panel wall separates noisy machinery area from assembly line in automotive parts manufacturer.

Examples of Quilted Fiberglass Absorbers in use


Product Information
Model No. Quilted Fiberglass Absorbers Product Description Nominal Quilted Thickness Roll Width Roll Length
QFA-1 Single layer fiberglass, one side faced with VCFC, opposite side faced with NPS 1 inch 48 inches 50 feet
QFA-2 Single layer fiberglass,  one side faced with SCFC, opposite side faced with NPS 1 inch 48 inches 50 feet
QFA-3 Single layer fiberglass, both sides faced with NPS 1 inch 48 inches 50 feet
QFA-4 Single layer fiberglass, both sides faced with VCFC 1 inch 48 inches 50 feet
QFA-5 Single layer fiberglass, both sides faced with SCFC 1 inch 48 inches 50 feet
QFA-6 Single layer fiberglass, one side faced with VCFC, opposite side faced with SCFC 1 inch 48 inches 50 feet
QFA-7 Double layer fiberglass,  one side faced with VCFC, opposite side faced with NPS 2 inches 48 inches 25 feet
QFA-8 Double layer fiberglass, one side faced with SCFC, opposite side faced with NPS 2 inches 48 inches 25 feet
QFA-9 Double layer fiberglass, both sides faced with NPS 2 inches 48 inches 25 feet
QFA-10 Double layer fiberglass, both sides faced with VCFC 2 inches 48 inches 25 feet
QFA-11 Double layer fiberglass, both sides faced with SCFC 2 inches 48 inches 25 feet
QFA-12 Double layer fiberglass, one side faced with VCFC, opposite side faced with SCFC 2 inches 48 inches 25 feet
QFA-14 Quadruple layer fiberglass, one side faced with VCFC, opposite side faced with NPS 4 inches 48 inches 25 feet
QFA-20 Quadruple layer fiberglass, both sides faced with VCFC 4 inches 48 inches 25 feet
QFA-22 Quadruple layer fiberglass, both sides faced with SCFC 4 inches 48 inches 25 feet

 

Table showing how the human ear perceives noise reduction.

Decibel Reduction Reduction Experienced by Ear
2 15%
4 23%
6 38%
8 48%
10 56%
12 63%
14 68%
16 75%
18 77%
20 81%