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FlutterFree® is a handsome, furniture grade, sound diffusing hardwood molding
that provides flutter echo control. Its application
converts rooms with flat parallel surfaces into functional spaces
with good speech intelligibility, sound quality, and a natural, comfortable
ambiance. It expands the designer's flutter control finish treatment options
beyond fabric upholstered surfaces.
Slotted FlutterFree® (Patent Pending) offers high frequency diffusion
with accompanying absorption below the diffusion
cutoff. Additional low frequency absorption may be added using helmholtz mounting configurations.
Problem
Repetitive reflections from hard parallel surfaces produce flutter echoes that are perceived as timbre coloration and degrade
sound quality and speech intelligibility. Absorptive surfaces are often used to control this annoying problem, with the side
effect of making the room too acoustically “dead”.
Solution
FlutterFree® is the first sound diffusing acoustical hardwood molding that
controls flutter echo by diffusion, maintaining the natural ambiance of
the room. When adjacent panels are spaced and mounted with an air
cavity, low frequency absorption can also be achieved.
Diffusion
The random incidence acoustical data illustrates how FlutterFree® provides useful sound diffusion in the high frequency range.
The chart displays the mean diffusion coefficient, which is the normalized
standard deviation of the 1/3 octave polar responses for angles of incidence
between 0° and 90°, the normalized scattering coefficient for computer modeling calculations and the A-mount absorption coefficient for reference.
Absorption
The supplemental absorption data illustrates
the performance of the FlutterFree® panels when mounted with different spacings and cavity depths.
Installation
FlutterFree® is shaped from hardwood that is
kiln dried to 6-8% moisture content. RPG® takes every precaution
to minimize warping by stress relieving the rear surface and treating all
exposed surfaces on prefinished orders. FlutterFree® can be configured and mounted in several ways to take advantage of unique acoustical attributes. See mounting details at right.
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Home
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Products:
FlutterFree®
The First Sound Diffusing Hardwood Molding From The Acoustical Industry’s Leading Innovator
| Features
& Benefits |
Features
Furniture grade, hardwood, sound diffusing acoustical molding
Low frequency absorption mounting option
FlutterFree® works on the 1D QRD® reflection phase
grating principle
Modular extruded diffusive strips
Benefits
Handsome furniture grade hardwood finish offers specifiers a
new approach to flutter echo control that does not rely on the
use of fabric upholstered fiberglass panels
Offers an almost unlimited variety of lacquered, stained, or
painted finishes and hardwood options
Diffusive flutter control minimizes flutter echoes without making
the space acoustically ®dead”
Diffusive flutter control provides an ambient environment to
support speech in conference rooms for less fatigue, greater
coverage, and high speech intelligibility
Mounting FlutterFree® over an air cavity provides low frequency
absorption to minimize boominess and lack of definition in small
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