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Quilted Fiberglass Sound Absorbers

Model KFA

Quilted Fiberglass Absorbers


Model KFA fiberglass absorbers are fire safe, high performance, acoustical attenuating fiberglass blankets that are used to reduce reverberant (reflected) airborne noise. The absorbers are 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 temperature range, 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. Class A Flammability ratings per ASTM-E-84.

Kinetics KFA absorbers fundamental component is a low binder, fine fiber, acoustically absorptive, fiberglass batting. Two different reinforced, nonporous, fiberglass cloth facing materials are available and are quilted directly to the fiberglass batting using high strength thread and locking stitches. The quilting forms a matrix of 4" (102 mm) diamond stitch patterns which encapsulate the glass fibers. When the facing material on these stable encasements is subjected to airborne sound waves, the individual membrane faces respond diaphragmatically, like a drum head, and transmit sound energy through the nonporous facing into the fiberglass batting core material, where it is dissipated as thermal energy.

Model KFA can be produced in single or double layer, nominal thickness 1" (25 mm) or 2" (51 mm). Double layer thickness increases low frequency absorption and provides significant transmission loss characteristics.

Quilted Fiberglass Absorbers

Depending on the application requirements, the quilted absorbers can be faced on one or both sides. Available facings include the standard aluminumvinyl coated fiberglass cloth (A), impervious high-temperature silicone-coated fiberglass cloth (S) which is quilted using a Nomex stitching thread, or nonmaintenance, nonwoven, porous, scrim fabric (N). The three facing materials can be used individually or in combination on the same absorber so that special properties or economies can be achieved.


Model KFA quilted fiberglass absorbers can be used in many diverse industrial or OEM applications including absorptive linings for machinery housings, building walls, curtain or fixed enclosures, compartments, hoods, operator cabs, piping and duct work or wherever reduction of reverberant noise is required.

Absorption Characteristics

Product Nominal Thickness Octave Band Frequency (Hz)
125 250 500 1000 2000 4000 NRC
KFA-10Q-NA 1 in (25 mm) 0.12 0.47 0.85 0.84 0.64 0.62 0.70
KFA-10Q-NS 1 in (25 mm) 0.04 0.46 0.86 0.81 0.59 0.31 0.70
KFA-20Q-NA 2 in (51 mm) 0.08 0.33 0.79 1.02 1.04 1.02 0.80
Quilted Fiberglass Absorbers
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Specifications and Physical Properties

Quilted Fiberglass Absorbers have been approved for underground use on mining equipment.

Quilted fiberglass absorbers shall be model KFA by Kinetics Noise Control, Inc.