Whispermat is specifically designed to absorb, attenuate, and dampen noise. Whispermat barrier composites combine dense, limp flexible, non-lead loaded barriers with Hushcloth© acoustical foams forming a total acoustical system. Unlike many other sound control materials available, these multilayer composites are manufactured without costly adhesives, thus eliminating the potential for adhesive failure. Designed by acoustical engineers, Whispermat achieves maximum acoustical performance economically.
Three basic principles are utilized:
- The barrier septum is used to impede the amount of airborne sound to gain optimum transmission loss.
- Hushcloth©acoustical foams absorb the airborne sound with a minimum of reflection. When laminated to the barrier the noise is both absorbed and isolated.
- The composite dampens noise by reducing vibration on metal, wood, and plastic surfaces.
The wide variety of constructions makes possible engineered solutions for most OEM and in-plant applications. Whispermat is available in single and double layer septums, various barrier weights, foam thickness and a variety of surface treatments. Whispermat can be purchased in rolls or sheets and can be die cut or fabricated to customer specifications. These foam barrier composites are easily cut with a knife, shears or scissors. An economical SBR pressure sensitive adhesive or an acrylic PSA, for temperatures to 200 degrees F can be applied to any Whispermat product. It is recommended that contact adhesive or mechanical fasteners be utilized when using these heavily loaded composites.
| Physical Properties | ||
| Color | Barrier: Black | Foam: Charcoal Grey |
| Density | Barrier 1/2 to 2lbs sq ft.; | Foam 2lbs cu. ft. |
| Flammability | MVSS 302, SAE J369, Special Formulation to UL-94V and FAR 25.853 | |
| Temperature Range | -30 degrees Farenheit to +200 degrees Farenheit MIL-STD-810 at 250 degrees Farenheit, 7 24 hr. periods PASS | |
| Cold Crack | MIL-STD-810 at -25 degrees Farenheit, 1"e mandral PASS | |
| Thermal Conductivity | .30-.38 BTU in per hr. sq. ft. degrees Farenheit ASTM C518 | |
| Tear Strength | 20 lbs in min. ASTM D624, DIE C | |
| Tensile Strength | 240 lbs sq. in. min. ASTM D 412, DIE 1 | |
| Peel Strenght | 2.2lbs in. min., ASTM D903 | |
| Elongation | 120% | |
Whispermat1
Whispermat1 combines a single barrier layer with a single layer of Hushcloth® acoustical foam. When the barrier is applied to sheet metal, plastic, or wood, the foam is exposed to absorb airborne noise. The barrier functions both to contain sound, and acting as a mass damper, eliminates structural vibration.
When the foam is applied to the structure the barrier is decoupled. The exposed barrier becomes a tough, durable surface with enhanced transmission loss properties. Often a facing will be laminated to the barrier to increase both durability and weatherability when used as a pipe wrap.
When a 1/4″ or 1/2″ foam decoupler is incorporated WM1 is frequently used as a carpet underlayment. When moisture is of concern, as in the case of a marine or truck cab application, closed cell foams can be used
Surface Treatments
Foam Side: Embossed, Aluminized polyester, reinforced metalized, and urethane (white, black). Barrier Side: Plain black, white reinforced, Silver reinforced.
Standard Sizes (Whispermat1)
Rolls: 54″ x 50′
Sheets: 54″ x 72″
Fabricated or Die Cut Parts Foam Thickness: 1/4″ – 2″
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Specifications – Whispermat1
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| Frequency Hertz | 125 | 250 | 500 | 1000 | 2000 | 4000 |
| Transmission Loss, db | 18 | 20 | 25 | 32 | 34 | 36 |
| Transmission loss ASTM E90-75 1″ absorber without enhancement Riverbank Acoustical Laboratories |
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Whispermat2
Whispermat2 is a sandwich composite incorporating 2 layers of Hushcloth® acoustical foam and a single barrier septum. When applied to sheet metal, plastic, or wood, the isolation foam layer, typically 1/4″ thick, decouples the barrier while the thicker absorption layer reduces airborne sound. This economical acoustical system can be formulated to provide maximum noise reduction in the harshest environment by adding various facings or embossed surfaces.
Surface Treatments
Embossed, Convoluted, Aluminized Polyester, Reinforced Polyester, Urethane-Matte or Impervious, Perforated Vinyl (Sandpiper, Black), Tedlar (Dupont), Custom Facings Available
Standard Sizes (Whispermat2)
Rolls: 54″ x 50′
Sheets: 54″ x 72″
Fabricated or Die Cut Parts Foam Thickness: 1/4″ – 2″
| Specifications – Whispermat2 | ||||||
| Frequency Hertz | 125 | 250 | 500 | 1000 | 2000 | 4000 |
| Transmission Loss, db | 21 | 27 | 29 | 37 | 49 | 53 |
| Transmission loss ASTM E90-75 1″ absorber without enhancement Riverbank Acoustical Laboratories |
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Whispermat Safe & Sound
Whispermat Safe and Sound combines a specially formulated barrier with high temperature melamine foam. Themechanical bond between the foam and barrier eliminates the potential for adhesive failure and enhances the flammability and smoke characteristics.The light weight melamine foam meets the low smoke (16.9) and flame spread(2.5) of ASTM-E84.This environmentally safe and acoustically sound composite meets the strict requirement of ASTM-E 162-90 and ASTM 3-662-93 for the transportation and rail industry.
| Specifications for WHISPERMAT Safe & Sound | |||
| Color | White | MVSS | 302 Pass |
| Size | 48″ x 24″ ; 48″ x 48″ | ASTM C795 | Foam Pass |
| Barrier Weight | 1/2 lb./sft. – 1 1/2 lb/sft | UL-94-5 | Foam Pass |
| Thermal Conductivity | .25 BTU in/h sft F at 68′ | UL94 V-O | Foam Pass |
| Foam Temperature | -32F to 400F Intermittent | UL 94 HF-1 | Foam Pass |
| Composite Temperature | -32F to 300F | FAR 25 853 (a-1) | Foam Pass |
| Density melamine foam | .7 Ib.sft | FAR 25 853 (a) | Foam Pass |
| Tested to Boeing BSS 7239 | ATS 1000.001 | Foam Pass | |