|
& Recommendations |
|
All Corporate Acoustic Panels consist of high quality, smooth glass fibre cores with resin hardened edges resulting in very light weight, non-warpable sound absorptive substrates to which approved fabrics are adhesively bonded to minimize the possibility of future sagging. This construction does not require any interior wood or plastic frames which can "telegraph" through the fabric covering.
Acoustical Ratings
Sound Absorption Coefficients
(in sabins) versus Frequencies (in hertz)
ASTM E 90-81 and ASTM
E 413-73, C423-81A, on Type A Mountings
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Sound absorption is measured
in Sabins. 1.0 Sabin is equivalent to 100 percent of the sound
energy being absorbed. For example, the above sound absorption
rating for a 1.0 inch thick panel core at a frequency of
500 Hz is 0.45 Sabins,
or 45 percent absorption of sound energy at that frequency. Although
it is theoretically incorrect to exceed 1.0 sabins, or 100 percent
in absorption, some of the above ratings do because of "edge
defraction".
N.R.C. or Noise Reduction Coefficient is only a relative indicator of a material's sound absorption. Acoustical consultants also carefully considers the absorption coefficients ranging between 125 and 4000 Hz.
The above ratings are predicated on covering panels with a open weave fabrics similar to Guilford of Maine FR701. Avoid very tightly woven fabrics which may restrict transference of sound energies at particular frequencies into the core material.
Panel Sizes are available up
to 60" X 120".
Curved Panels fabricated for
concave surfaces.
Tackable - Impact Resistant Panels are
fabricated utilizing high density, sound transparent substrates.
Edge Details:
|
|
|
|
|
|
Edge detailing, such as bevel, are more "forgiving' than square edges under most lighting conditions. Moreover, butted, square edge panels are impractical to replace because original fabric dye lots must be matched.
Fabric Finishes - Guilford of Maine FR701 fabrics & acceptable customer's own material (C.O.M.).
Some fabric textures and colors (especially light colors) may magnify minor core defects depending on the lighting that will exist in the installation location. Always carefully verify appearance with a large mock-up panel covered with the selected fabric.
Fire Rating - Glass fibre cores and Guilford of Maine's fabrics have Class 'A' Flame Spread Ratings of 25, or less. Recommend that other specified fabrics comply with local fire code.
Toxicity - Our resin hardener is water based and odor free. Beware of petroleum based resins !!!
Installation Techniques -Adhesively applied panels (which are still removable) usually result in superior installations than those with mechanical or fabric fasteners. However, mechanical and fabric fasteners are available if otherwise still requested. Magnets are available for very quick and effective applications to metal partitions.
Drawings & Dimensions -Detailed
shop drawings and accurate field dimensions are strongly recommended.
If pre-arranged,
this service will be provided when ever possible...as well as competent
installation supervision.
Approval For Fabrication - requires purchaser's written acceptance of project's mock-up panels covered with the selected fabric and approval of shop drawings.
Suggested Specifications - Please contact us, for suggested panel and installation specifications applicable to your project.
Custom Requirements - Furnish
us with details of any custom requirements.