Hushcloth

Acoustical foam is the most versatile of all noise control materials. dB Engineering has the right foam for your application.

MATTE FILM FINISH
	Provides a tough, puncture resistant textured surface making it suitable for use in machine enclosures.

METALIZED MYLAR
	Metalized mylar foam is excellent for use around liquids. The reflective, wipe-clean surface protects against oils, water and many chemicals. Reduces head transfer. [Click for larger photo.]

EMBOSSED FOAM

Embossed faced foam is a high performance acoustical material with superior absorption at the most critical frequency bands. It is often used in speaker housings, medical equipment, HVAC units, blower enclosures, and office equipment such as computer and printer housings. The embossed surface has an attractive, high tech appearance that is pleasant to the touch. It readily stands up to abusive air streams and the associated abrasion in air ducts and blower housings. Embossed foam increases sound absorption performance in the most critical frequency bands by 25% to 35% when compared to other available foams. [Click for larger photo.]

FOAM DAMPING SHEET - EMBOSSED
Sound Absorption plus Vibration Damping

The need to absorb noise inside a machine enclosure often accompanies the need to damp vibration on the same structure.   Where it is not possible to totally enclose a noise source, as in many types of machinery, electrical appliances, office equipment and electronic controls, the inside of the enclosure should be lined with sound absorption material.  This provides a non-reflective surface that absorbs air noise generated by gears, linkages, fan blades and rotors.  To reduce vibration noise generated by the same enclosure, particularly if it is of sheet metal, damping is necessary.

Adhesive release paper, .050 inch thick damping, embossed foam, composite shown upside down for viewing purposes (Click to enlarge)

Embossed Foam Damping Sheet consists of a thickness of embossed foam bonded to a thin sheet of high-efficiency damping compound.  In this configuration, Embossed Foam Damping Sheet has proved to be a most satisfactory single solution to this twofold problem.

Available with or without high-quality, pressure-sensitive adhesive backing, it is easy to apply and has a neat appearance.

All thicknesses - 1/4", 1/2", 3/4", and 1" are effective for absorbing high-noise frequencies.   When lower frequencies are dominant, however, thicker foams and fewer openings in the enclosure are required.  Absorption values and damping rates are shown below.

Table 1

Table 2

How to Apply

Damping surface must be clean, free of dirt, oil or grease.  It can be applied to a clean painted surface.  Sometimes, on very smooth surfaces etching or roughing the surface may be required.  Sheet is cut to size with knife, shears or steel rule die.   If sheet is adhesive backed, strip away the protective paper, use roller to apply adhesive side to surface.

The surface treated need not be covered 100% to achieve high damping effectiveness.   A 2/3 area coverage provides at least 80% of the total damping expected.

PERFORATED VINYL FACED FOAMS

Perforated Vinyl Faced Foams combine the absorption properties of acoustical foams with the toughness and durability of vinyl.  The perforation pattern has been engineered to provide maximum absorption and resilience with 14% open area.  The attractive leather like appearance makes it ideal for vehicle interiors, marine headliners, and enclosures. Click to enlarge.)

Standard Sizes:
Rolls: 54" x 150'
Sheets: 54" x 24", 54" x 36", 54" x 72"
Standard Thickness: 1/2", 1", 2"
Standard Colors: Black, 383 Military Green, Sandpiper, White, Mojave Brown, Storm Gray, Embassy Gray

FOAM MELAMINE

Foam Melamine is a lightweight, high temperature resistant, open cell foam manufactured from melamine resin.  It combines excellent thermal properties with superior sound absorption capabilities to create a versatile fiber free product which can be applied in situations which may prohibit the use of urethane foams or fiberglass insulations.  [Click for larger photo.]

This fire retardant foam meets the flame spread, smoke density and fuelcontribution requirements necessary to comply with Class-1 building code regulations.  The high performance thermal and acoustical characteristics of this flexible, low density foam make it an ideal product for in-plant and FDA approved applications.  In addition to being the solution to aircraft and architectural noise problems,Melanine Foam is the material in use in OEM products requiring a combination of thermal and acoustical insulation capabilities.  Optional facings can be applied for more durability and chemical resistance as well as pressure sensitive adhesive for ease of installation.

Physical Properties:
Color: White
Density: .7 lb/ft³ ASTM D3574-86 test A
Tear Strength: .5 ppi per ASTM D3574-86 test F
Tensile Strength: 18 psi per ASTM D3574-86 test E
Elongation: 15% per ASTM D3574-86 test E

Thermal Conductivity: BTU/hr., Ft²., ^oF/in.; .25 per ASTM C 177
Temperature: -45^o F - 302^o F Continuous; to 400^o F Intermittent

Standard Sizes:
Sheets: 24" x 48", 48" x 48", 48" x 96"
Standard Thickness: 1/4" to 18"

All our foam products do not drip upon ignition, cease to burn after removal of the source of ignition and produce a minimal amount of smoke.

IMPORTANT: When the foam is subjected to dirt, grease, moisture and chemical attack, it may require a foam with a protective surface treatment such as our Metalized Mylar or Matte Film Finish foams above.

Most of our products meet all the requirements of UL-94, MVSS-302 and FAR 25.83b. Call or e-mail to request expanded specifications and technical data sheets.

Call us for a quotation for
your specific needs and quantity.

Does this product solve your noise
or vibration problem?
We have many other solutions
here in our web site, or
call us at 1-800-NO-NOISE now for
and let our experts help you.
Or, use our convenient e-mail inquiry form.