FlutterFree ® Plank
PRODUCT OVERVIEW The FlutterFree ® Plank is an attractive, furniture- grade, solid wood molding that provides high-frequency diffusion. As a simple plank product, it is often incorporated into wall and ceiling assemblies that, in addition to high-frequency diffusion, can also provide low-frequency absorption for bass control in technology spaces. A back-slotted configuration transforms the FlutterFree ® Plank into a hybrid product that offers sound absorption just below the sound diffusion bandwidth, extending the overall bandwidth of the product to solve multiple room acoustic issues in one attractive product. SIZING • Standard Plank: 3-29/32" W x 8' L x 1-1/32" T (Custom plank lengths up to 10' L are available) • Wood planks weigh approx. 1.00 lb/lf 2 FIRE RATING Standard product not rated Class A (per ASTM E-84) finish available if specified FINISH FlutterFree ® Planks are available in various finishes, including solid woods (Ash, Cherry, Mahogany, Maple, Red Oak, Walnut, White Oak) and painted surfaces. RPG offers clear lacquer or factory color-matching of wood finishes and paint colors. INSTALLATION FlutterFree ® Planks can be nailed to a wall surface on furring strips supplied by others. For low-frequency absorption mounting, please refer to RPG supplemental data sheets. A #0 or #10 (1/16") wood spacer biscuit is provided by RPG for plank-to-plank alignment.
Blue = Diffusion Coefficient Green = Scattering Coefficient Red = Absorption Coefficient - NRC = 0.15, SAA = 0.15
Additional test data is available – please see the Supplementary Acoustical Data Charts online or contact your local RPG Sales Representative.
Diffusion Coefficient
Frequency (Hz)
2000 2500 3150 4000 5000 6300 8000
0.07 0.06 0.10 0.27 0.34 0.48 0.58 0.54 0.37 0.36 0.52
10000 12500 16000 20000
Note: Previously FlutterFree ®
RPG Acoustical Systems, LLC. | 99 South St | Passaic, NJ 07055 rpgacoustic.com | info@rpgacoustic.com | 973-916-1166
FlutterFree ® Plank 03/2023
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