Firwin Corporation
1685 Flint Road
Toronto, ON M3J 2W8
Tel: 416.745.9389 • Fax: 416.745.0782
Email: firwin@firwin.com • Website: www.firwin.com
All Categories > Stocked Insulation and Safety Products > Sound Attenuation > High Efficiency - Economical Noise Enclosures > Part # BTMM-14C  


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Part # BTMM-14C, High Efficiency - Economical Noise Enclosure

ENCLOSURES LINED WITH HIGH QUALITY COMPOSITES TO CONTAIN NOISE AT THE SOURCE.

Metallized mylar facing provides high contamination resistance and light reflectivity. It is suitable for very dirty, wet or oily environments and can be exposed to direct spray.





Specifications  · Performance Data  · Material Specifications  · Installation Recommendations

Specifications

Noise Levels
The use of AcoustiGuard™ composites in enclosures can reduce noise levels anywhere from 20 to 40 dBA. Careful preparation of all openings, seals and joints will eliminate noise leakage paths and maintain maximum performance.

Protective Cover
Metallized Mylar Film faces in towards the noise source and protects the absorption layer from contamination.

Acoustic Foam
Absorbs noise and prevents it from reflecting out of the enclosure.

Barrier Layer
Provides transmission loss, keeping the sound within the enclosure.

Foam Decoupler
Enhances the performance of the barrier - glued directly to the inside of the enclosure.


Performance Data

In addition to environmental conditions, individual application requirements will determine choice of composite. These transmission loss and absorption performance charts can be used to make the appropriate selection.

STC
Transmission Loss Capabilities for Decoupled Barrier Composites (BTMM-14C & BV-14C)
NRC
Absorption Characteristics for 1.0 in. Acoustic foam layer with Individual Coverings.




Material Specifications

Thickness
Approx. 1.25 in. - Overall Composite Thickness.

Standard Dimensions
Sheets - 54" X 72" (27 sq. ft.)

Composite Weight
1.8 lb./sq.ft.

Flammability
MVSS 302-Passes

Foam Density
ASTM D 3574-86 — 1.8 - 2.2 lb./ cu.ft.

Thermal Conductivity of Foam at 75°F (24°C)
ASTM C 518 — 0.27 Btu. in. / hr. ft.² ºF


Installation Recommendations
Composite material is glued directly to the entire interior surface of the enclosure. Sheet metal should be degreased and plywood must be primed for best adhesion. To maintain an unbroken barrier layer, care must be taken when fitting material into corners at the horizontal and vertical edges of the enclosure structure.

1. Cut away section of absorption layer on all edges where composite pieces meet at right angles.

2. Cut and fit adjacent pieces accurately to ensure there are no gaps in the barrier.





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