SECTION 15152
ONE DIMENSIONAL SOUND DIFFUSER (FlutterX 19)
PART 1 GENERAL
1.01
SECTION PARAMETERS
A.
B.
1.02
PRODUCTS INSTALLED BUT NOT SUPPLIED UNDER THIS SECTION
A.
1.03
Wood or metal mounting battens.
RELATED SECTIONS
A.
B.
C.
D.
E.
F.
1.04
A One Dimensional Acoustic Diffuser: Quadratic Residue Diffuser, Model FlutterX 19
Interfacing with all trades and services having components that mount to, penetrate through or are
concealed in, behind, below or above the wood acoustic panels of this section.
Section 00001 – Wood Paneling
Section 00002 – Framing/Furring for Gypsum Board Assemblies
Section 00003 – Gypsum Board
Section 00004 – Mechanical
Section 00005 – Electrical
Section 00006 – Audio or Data
DEFINITIONS
A. Two Dimensional Acoustic Diffusers can be either installed as separate units or combined to form a
larger single unit.
1.05
ALTERNATES
A. Substitutions: Substitutions for products in this section may be submitted to the architect and/or
acoustical consultant no later than seven (7) working days prior to the bid due date. Substitutions shall
only be considered if submitted with complete information including acoustic data and a sample not
smaller than 12” x 5 1/2” showing product design and finish. Acceptance of substituted products is
reliant solely on the architect’s and/or acoustical consultant’s approval and the substitution’s
compliance with all specified criterion.
1.06
REFERENCES
A.
B.
C.
D.
1.07
Local Building Code – Current Edition
International Building Code – Current Edition
International Organization for Standardization
1. ISO 354 Measurement of Sound Absorption in a Reverberation Room
2. ISO 17497-1 Sound-scattering properties of surfaces- Part 1: Measurement of the randomincidence scattering coefficient in a reverberation room.
American Society for Testing & Materials (ASTM)
1. ASTM C 423 - Sound Absorption & Sound Absorption Coefficients by the Reverberation Room
Method
2. ASTM E 84: Standard Test Method for Surface Burning Characteristics of Building Materials
DESCRIPTION
A.
Design Requirements: One Dimensional Sound Diffusers shall be based on the one dimensional
phase grating diffuser design, using an array of slotted, routed cells along the vertical axis. The
depth of the wells shall be based on a minimum prime 19 quadratic residue number sequence.
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B.
Performance Requirements:
1.
2.
1.08
Freq.
NRC
Freq.
NRC
Freq.
NRC
100 Hz
125
160
200
250
315
400
.00
.00
.00
.10
.09
.06
.03
500 Hz
630
800
1000
1250
1600
2000
.06
.06
.07
.03
.08
.06
.05
2500 Hz
3150
4000
5000
6300
8000
10000
.11
.10
.18
.06
.12
.05
.00
Scattering Coefficients: Tested by independent testing facility in accordance with ISO 17497-1
specifications providing 1/3 octave results. Average scattering coefficients shall be obtained in
a reverberation chamber using multiple microphones and random noise with multiple samples
per the ISO specification. Testing must be done on a full-size specimen.
Freq.
SC
Freq.
SC
Freq.
SC
100 Hz
125
160
200
250
315
400
.00
.00
.00
.00
.00
.00
.00
500 Hz
630
800
1000
1250
1600
2000
.01
.02
.02
.01
.01
.06
.10
2500 Hz
3150
4000
5000
6300
8000
10000
.17
.26
.42
.32
.28
.38
.27
SUBMITTALS
A.
B.
C.
D.
1.09
Random Incidence Sound Absorption Coefficients (a): Tested by independent testing facility
according to ASTM C 423 specifications with 1/3 octave results with both NRC specifications
provided. SAA Total specifications shall also be provided:
Product Data: Submit manufacturers’ technical data including basic system description, options and
component sizes. Identify all applicable features and options. Cross out any inapplicable features or
options.
Shop Drawings: The contractor shall produce and submit shop drawings of products and suspension
or mounting systems overlaid on base drawings (interior elevations or reflected ceiling plans)
supplied electronically by the architect. Show overall layout with dimensions and references to
details as necessary for penetrations, joints, ends and intersections with other materials or building
components. Submit schedule of all quantities, sizes, hole patterns, edge banding, borders, veneers
and finishes. Field-verify site conditions with dimensions shown on shop drawings.
Samples: Minimum 6” x 12” sample of specified wood and finish.
Certifications: Manufacturers’ certifications that products comply with specified requirements,
including laboratory reports showing compliance with specified tests and standards.
QUALITY ASSURANCE
A.
B.
C.
D.
Qualifications: Manufacturer and installation contractor shall have a minimum of two years
experience with similar systems.
Single Source: All products under this section shall be supplied by a single manufacturer to ensure
consistency in product size and finish.
Woodworking Standards: Manufacturer to comply with specified provisions of Architectural
Woodworking Institute quality standards.
Pre-Installation Meeting: Installing contractor shall organize and conduct pre-installation meetings
with all other trades to coordinate substrate conditions, conditioning of the space (temperature &
humidity), and elements attaching to, penetrating through or concealed above/behind work in this
section.
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1.10
DELIVERY, HANDLING AND SITE STORAGE
A.
B.
C.
1.11
PROJECT CONDITIONS
A.
B.
C.
1.12
Shipping and Handling: Deliver all manufacturers products to the job site in the original packaging
with all components intact and inspected for any damages in shipping. Do not open until all
specifications have been met.
Storage: All products are to be stored in a safe, dry location with no potential for exposure to
moisture, excess heat or cold and allowed to acclimate to climate.
Site Acceptance: Insure that all product packaging has been inspected and found free of damages,
follow all criteria for storage as listed above.
Project Phase Completion: All manufacturers products should be installed in the finish phase of the
project, generally after all paint, dust, flooring and other trades have been substantially completed.
Product Acclamation: For a minimum period of forty-eight (48) hours and prior to unpacking or
installing any wood products, allow both the installation area and the wood products to stabilize in
temperature and humidity levels that are representative of the final temperature and humidity levels
expected after building completion and occupation. Do not install products if the humidity
exceeds 60%.
Product Handling: Handle wood panels carefully so as to avoid scratching, denting or damaging the
wood finish or other portions of the unit(s).
WARRANTY
A. The manufacturer’s warranty should be submitted to the Owner(s) or Owner(s) Representative upon
delivery of the products to the site. All warranties are effective from the date of delivery to the site.
The warranty for all products should be a minimum of one year and include product replacement in the
event of defect, warping out of tolerances and finishes.
1.13
MAINTENANCE
A.
Maintenance: The manufacturer’s instructions for the cleaning and maintenance of the products shall
be delivered to the Owner(s) and/or the Owner’s Representative upon delivery to the site.
PART 2 PRODUCTS
2.01
MANUFACTURER
A.
2.02
MATERIALS
A.
2.03
2.04
RealAcoustix LLC 887 N. McCormick Way, Layton, Utah 84041 (801) 807-0310
Email:info@RealAcoustix.com Website: http://www.RealAcoustix.com
Product shall be a solid Maple wood unless other wood is specified. All products are finished in
clear conversion varnish unless otherwise requested. Other wood types are available and should be
indicated in this section if appropriate.
MANUFACTURED UNITS
A.
Unit Dimensions
1. Standard 2 x 2 Units: Height 96” Width 5 ½”, Depth 1”
B.
Weight
1. Standard 96” unit: 6.7 pounds +/- 10 ounces
MOUNTING
A.
All units are provided with slotted edges for coupling with standard biscuits and glue. Units are
mounted using 18 GA. finish nails directly to surface. Construction adhesives may be used on back
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Acoustic Wall/Ceiling Diffusers
to insure stability over time. When mounting, every other unit shall be alternated on the vertical
plane to accomplish the proper sequencing of the diffuser.
2.05
FINISHES
A.
Manufacturers Finishes: The units shall be finished in a conversion varnish to insure non-yellowing
and to provide additional protection of the finish unless otherwise specified.
PART 3 EXECUTION
3.01
INSTALLERS
A.
3.02
EXAMINATION
A.
3.03
The installer shall make every effort to insure a proper fit for all products while installing. In the
event that adjustments shall be necessary the installer shall follow the manufacturer’s installation
instructions for making these adjustments.
CLEANING
A.
3.06
All products shall be installed in a workmanlike fashion and by professional installers only. All
products should be test fit prior to installation to insure proper fit and finish. In addition, all cavities,
spaces and other locations provided by others shall be fully inspected and measured to insure that they
meet the architects specifications for the installation of the manufacturer’s products.
ADJUSTING
A.
3.05
Site Conditions: The installer shall verify all manufacturers conditions for site conditions and insure
that all conditions are optimal for installation of the wood products based on the information
provided by the manufacturer. This shall include, but not be limited to, the substantial completion of
all work that would cause dust, paint, moisture and/or other features that may be harmful to the
manufacturers products.
INSTALLATION
A.
3.04
Installing contractor shall have a minimum of three (3) years successful experience installing wood
ceiling and wall systems in similar applications using similar mounting techniques or suspension
systems.
All manufacturer’s products shall be cleaned using a vacuum with a soft bristle brush only after
installation. Smudges and other debris may be removed with a moist (not wet) cloth with no cleaning
agents to be used in the process. Consult the manufacturer if further cleaning is necessary.
PROTECTION
A.
All products should generally be mounted as to minimize human interaction with the products when
possible. Products shall be protected from direct sunlight, excess heat (+90 degrees F) and moisture
or excess humidity.
END OF SECTION
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