Barrier and Quilted Fiberglass Absorber Composites

dB Engineering BSC Composite features a non-reinforced loaded vinyl noise barrier septum (middle) with a quilted fiberglass sound absorber on both sides.  Ideally suited as an acoustical liner, the inner layer of quilted fiberglass decouples the barrier from the surface to improve its noise blocking ability while the outer layer adds sound absorption to the treated environment.

An outdoor enclosure shielding workers from hydraulic noise from a ball mill.

An outdoor enclosure shielding workers from hydraulic noise from a ball mill.

Features

  • Maximum noise reduction by combining sound absorber and noise barrier
  • Sound absorption Rating to NRC-1.05
  • Transmission Loss Rating to STC-32
  • Offered in two styles with a variety of combinations
  • Acoustical liners, jackets, wraps and panels
  • Flexible composites conform to any shape
  • Fire safe and low smoke emissions per ASTM E-84, Class A

Applications

  • Acoustical curtain enclosures
  • Building treatments for community noise problems
  • Diesel engine compartments of buses, trucks, construction equipment
  • Outer coverings for noisy pipe and ducts
  • Transmission housings
  • Machinery enclosures, liners

Examples of Usage

dB Engineering BSC Composite features a non-reinforced loaded vinyl noise barrier septum (middle) with a quilted fiberglass sound absorber on both sides.  Ideally suited as an acoustical liner, the inner layer of quilted fiberglass decouples the barrier from the surface to improve its noise blocking ability while the outer layer adds sound absorption to the treated environment.

Also Available As:

  • Rolls with edges bound and sewn with matching edge binding
  • Unbound rolls-edges exposed
  • Standard roll size 4’W x 25’L
  • Curtain panels with grommets at top and Hook & Loop fasteners sewn along edges
  • Liner panels with bound edges
  • Die-cut pieces, custom fabrics
  • Types of facing material on quilted fiberglass:
    VCFC – Vinyl Coated -Fiberglass  cloth
    SCFC – Silicone Coated Fiberglass cloth
    NPS – Non-Woven Porous Scrim
    Guilford – Decorative Fabric
  • Available Barriers:
    BSC products utilize 1 lb. PSF non-reinforced loaded vinyl noise barrier septum (B-10NT).
    Also available with a 2 lb. PSF or 1/2 lb. PSF barrier

dB Engineering BBC composite features a reinforced loaded vinyl noise barrier with a quilted fiberglass sound absorber on one side.  The rugged durable exterior barrier is commonly used as a wrap or acoustical jacket due to its ability to conform to any shape.  The quilted fiberglass layer decouples the noise barrier to enhance its acoustical performance.

Also available as:

  • Rolls with edges bound and sewn with matching binding
  • Unbound rolls with quilted fiberglass edges exposed
  • Standard roll size 54″ wide barrier, with 48″ wide quilt, 25′ long
  • Curtain panels with grommets at top and Hook and Loop fasteners sewn along edges
  • Custom fabricated acoustical jackets
  • Die-cut pieces
  • Barrier: BBC products utilize a flexible 1 lb. PSF center reinforced barrier back (B-10R). Available in standard gray color.  Tan and light blue are also available.  2 lb. PSF and 1/2 lb. PSF reinforced barriers are optional.

Both styles are available in curtain panels, bound or unbound rolls, custom fabrications or die-cut pieces, in standard vinyl-coated-fiberglass-cloth facings, high-temp silicone facings or economy facings.

Acoustical Data

Sound Transmission Loss (dB) Octave Band Center Frequencies (Hz)
Product Thickness
(In/Nom)		 Wt.
Lb/SF		 125 250 500 1000 2000 4000 STC
BBC-13-2″ 2 1.5 13 20 29 40 50 55 32
BBC-13 1 1.3 11 16 24 30 35 35 27
BBC-14-2″ 2 1.5 13 20 29 40 50 55 32
BBC-14 1 1.3 11 16 24 30 35 35 27
BSC-25 2 1.5 12 16 27 40 44 43 29
BSC-25-2B 2 2.5 19 22 28 40 56 61 33
BSC-31 2 1.5 12 16 23 33 38 39 27
Per ASTM: E 90
Barrier Specifications
Barrier
Component		 Style Weight
Lb./Sq. Ft.		 Thickness
Inches		 Composite
B-10NR Non-Reinforced 1 .107 BSC
B-5NR Non-Reinforced 1/2 .042 BSC
B-20NR Non-Reinforced 2 .225 BSC
B-10R Reinforced 1 .090 BBC
B-5R Reinforced 1/2 .050 BBC

Sound Absorption Data-Absorber Component Random Incident Sound Absorption
Product Octave Band Center Frequencies (Hz)
125 250 500 1000 2000 4000 NRC
BBC 1″ thick .12 .47 .85 .84 .64 .62 .70
BBC 2″ thick .07 .27 .96 1.13 1.08 .99 .85
BBC 4″ thick .21 .89 1.09 1.17 1.13 1.07 1.05
BSC 2″ thick .19 .99 .96 .80 .57 .33 .85
Per ASTM: C423-81 and C423-90a

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%