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Applications
Conference and teleconference rooms, Public spaces, Listening rooms, Recording and broadcast studios, Post production studios, Home theaters, Distance learning centers, Rehearsal rooms, Auditoriums, Performance spaces

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.

Product Samples 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
Acoustical Data Sheet 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
Supplemental Absoprtion Data 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.




Home : Products: FlutterFree®

The First Sound Diffusing Hardwood Molding From The Acoustical Industry’s Leading Innovator

Product Samples

FlutterFree® Product Information Packet
(ZIP - 1,230 Kb)
Downloading this file requires Winzip.

2 Page Brochure


Specifications

CSI Specification

Acoustical Data

Supplemental Absorption Data

Order Code

Wood Fact Sheet

Fire Data Sheet

Warranty


Mounting Details

All Mountings

A Mount
C Mount
C Mount Helmholtz
D Mount
D Mount Helmholtz


Cutsheets

Non Slotted

Slotted


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 rooms

Copyright 2000, RPG Diffusor Systems, Inc.
651-C Commerce Drive, Upper Marlboro, MD, 20774, Phone: 301-249-0044, Fax: 301-249-3912, E-mail: info@rpginc.com