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Acoustics First® Quadratic
Diffusers provide balanced sound throughout a
performance space and help reduce excessive
sound concentration or “hot spots”. A true
Quadratic Residue Diffuser is designed so that
the reflected sound waves are harmonically
dissociated from the source waves and spread
over time to create a more neutral listening
space. By incorporating quadratic residue number
sequences to provide uniform broadband
scattering, acoustical sound energy is diffused
and high-Q (steep peaked) reflections are
reduced. Undesirable specular sound reflections
from flat ceilings are eliminated without
resonance or excessive dampening.
Construction
Borrowing a feature from the patented
Art Diffusor® design, the well bottoms of the
Acoustics First® Quadratics are angled at 10 –
degrees to extend the units range and scatter
higher frequencies that would otherwise reflect
in a straight line-of-sight path, back into the
room.
Installation
Quadratic Diffuser Ceiling Panels may be
installed into heavy-duty 15/16" face lay-in
ceiling grid systems. They may be flush-mounted recessed,
or installed on a wall surface with suitable
surrounding trim
Uses include band rooms, sound
studios, worship facilities, auditoriums, and
performing arts theaters, where its wide
bandwidth, low cost, and choice of finishes make
it a preferred selection for diffusion.
Technical Specifications
Although it is a one-dimensional
phase grating diffuser and produces a
directional hemispheric polar response, the
units may be oriented in any direction and,
by alternating 90 degree rotation, will
provide two-dimensional diffusion outside of
the near field. Useful range of
diffusion begins at 600 Hz and extends to
4000 Hz and above. It also provides some low
frequency diaphragmatic absorption in the
250Hz range due to its flexibility and outer
dimensions. This may be enhanced or reduced
with back-fill insulation or dampening, as
needed to control mid-bass.
Fire Rating: Class 1 (A) Per ASTM E84
Material:
Class A Thermoplastic
NRC: 0.30 |
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(Click to Enlarge) |
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Size: |
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23-5/8" x 23-5/8" |
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Depth: |
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4" (nominal) |
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Weight: |
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3.75 lbs. per
unit |
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Mount: |
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Drop into T-Bar Grid (15/16") or wall
recessed |
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Model Q Specifications |
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