ACOUSTICAL MATERIALS

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 INTRODUCTION
• Acoustics is the interdisciplinary science that deals with the study of all mechanical waves in
gases, liquids, and solids including vibration,sound, ultrasound and infrasound. A scientist
who works in the field of acoustics is an acoustician while someone working in the field of
acoustics technology may be called an acoustical engineer. The application of acoustics is
present in almost all aspects of modern society with the most obvious being the audio and
noise control industries.

 The word "acoustic" is derived from the Greek word ἀκουστικός

(akoustikos), meaning "of or for hearing, ready to hear" and that from
ἀκουστός (akoustos), "heard, audible",which in turn derives from the
verb ἀκούω (akouo), "I hear".

The study of acoustics revolves around the generation, propagation and

reception of mechanical waves and vibrations.
TYPES OF MATERIALS

• SOUND ABSORBERS

• SOUND DIFFUSERS

• NOISE BARRIERS

• SOUND REFLECTORS
 SOUND ABSORBERS
• These sound absorbing acoustical panels and soundproofing
materials are used to eliminate sound reflections to improve
speech intelligibility, reduce standing waves and prevent comb
filtering.
• Typical materials are open cell polyurethane foam, cellular
melamine, fiberglass, fluffy fabrics and other porous materials.
A wide variety of materials can be applied to walls and ceilings
depending on your application and environment.
• These materials vary in thickness and in shape to achieve
different absorption ratings depending on the specific sound
requirements.
TYPES –
 Acoustical foam panels
 White paintable acoustical wall panels
 Fabric wrapped panels
 Acoustical wall coverings
 Ceiling tiles
 Baffles and banners for ceiling
 Fibre glass blankets and roll
 ACOUSTICAL FOAM PANELS

• These acoustical foam sound absorbers are used in a wide variety of applications ranging
from Recording and Broadcast Studios to Commercial and Industrial Facilities.

• Available in Polyurethane or in a Class 1 Fire Rated foam.

• These products can be applied directly to walls, hung as baffles or used as freestanding
absorbers.
STACKABLE FOAM ANECHOIC WEDGE
Anechoic wedges are ideal for
Design enables you to controlling low frequency sound
increase thickness quickly to create a room that is
by nesting layers perceptually devoid of sound.
CUTTING WEDGE STANDARD POLYURETHANE FOAM
Installs to create seamless PATTERNS
absorptive walls and enchance Standard patterns include
imaging by reducing unwanted
wedge,pyramids,maxabsorption,
reflection. Available in 1’x1’ or
2’x4’ sheets
ceiling baffles, bermuda triangle
traps for corners, sounds cylinders
FIRE RATED FOAM free standing absorbers
Absorbers are lightweight open cell foams used when a Class 1 fire rated
foam is required. Standard patterns include Wedge, Pyramid, Max Wedge,
Ceiling Baffles and more. These can easily mount to walls or ceilings.
 WHITE PAINTABLE PANELS
-It is a white acoustical wall panel with a soft textured appearance.
-----The two foot by one foot dimension provides installers flexibility to mount acoustical
panels around existing objects.
-In addition to reducing echo and reverberation, these acoustical
panels are used to create unique designs and patterns.
-The glass fiber core is faced with a paintable
covering. This allows you to match or complement existing wall colors by applying a light
coat of flat or matte spray paint.
∞ Quick & Easy acoustical solution
∞ Soft drywall texture appearance
∞ Create unique patterns
∞ Panel size allows for flexible mounting options
∞ Paintable & Printable finish
Construction: 1 " Fiberglass 6 PCF acoustical core + molded fiberboard
+ paintable facing. Resin hardened square edges. Paintable finish covers face and exposed edges.
Class A rating per ASTM E 84 Panel Size: 2' x 1' (24 inches by 12 inches)
Thickness: 1-1/8"
Quantity per box: 10 panels Mounting
Installs using standard impaling clip
SUSTAINABILITY
method. (adhesive by others) Other
This product bears the Green Cross label
mounting options shown below.
for recycled content. The acoustical
substrate is certified on average to contain
at least 35% recycled glass, with 9% post-  MOUNT IN CORNERS USING
consumer and 26% pre-consumer content.  MOUNT ON TWO INCH STAND
OFF CLIPS
  FABRIC WRAPPED PANELS
• Acoustical sound panels utilize 6-7 PCF glass fiber material for maximum absorption.
Available as wall panels, ceiling tiles, hanging baffles, acoustical clouds and bass traps, with
more than 50 standard colors to choose from, these materials will look as good as they sound.
The standard sizes and configurations best maximize raw materials, however, many of these
products can be customized to meet specific requirements should you need material sized to
fit or other finishes or coverings.
• Ceiling clouds reduce reflected sound in areas such as
theaters, restaurants, arenas, shopping malls, convention
centers, recording and broadcast rooms, or anywhere
absorption is required.
CEILING CLOUDS
•All surface faces and edges of the
WALL PANELS glass fiber core are wrapped in
fabric to match or accentuate room
•Used to reduce echo and décor . Ceiling Baffles absorb
reverberation in sound on all sides and edges.
applications, small and large. CEILING BAFFLES
CEILING TILES
These panels are
manufactured from a rigid •Sculptured sound absorbing
•Ceiling Tiles are an modular units used for walls, as
high density (6-7 PCF) glass
excellent choice for corner traps, bass traps and
fiber acoustical board and many ceiling grid
covered with an acoustically ceiling applications. Available in
applications requiring half-rounds or quarter-rounds.
transparent fabric.
high absorption.
BROADBAND ABSORBER
  WALL COVERINGS
• Acoustical wall fabric is a dimensional fabric that offers excellent acoustical properties,
unmatched fade resistance, and a fire/smoke retardant class A rating. Sound channels is
resistant to moisture, mildew, rot, bacteria, and is non-allergenic. Produced with no
voc’s (volatile organic compounds), ods’s (ozone depleting substances), heavy metals or
formaldehyde, it's the perfect acoustic fabric for offices, classrooms, conference centers or
any area where speech intelligibility is a critical factor.
Installation:
•This material is not factory trimmed. It is necessary
for the installer to cut a straight vertical edge
•Following the ribbed pattern. All edges must be butt
joined. Do not overcut edges. Cut material to
•Desired lengths, allowing for top and bottom
trimming. Wall carpet should be hung
•
Features: Applications: •Straight up. Do not alternately reverse strips.
Apply a premixed heavy duty adhesive
•Lightweight Acoustic Fabric •Conference Rooms
directly to the
•Easy to install •Theaters
wall, allowing it to dry to its maximum
•Class A •Hospitals
tackability
•Passes Corner Burn Test •Municipal
•Without it being overly dry. (Important!!! Adhesives
•Available in Many Colors •Office Partitions
are ready mixed. Do not dilute)
•Durable / Abuse Resistant •Schools
•Improves Speech Intelligibility •Hallways •Adhesive and do not apply adhesive to the back of
the wall covering).
• and more...
•Please be sure to follow instructions as provided by
  CEILING TILES
• Cloudscape® Ceiling Tiles absorb noise and block sound transmission. These ceiling tiles are
designed to fit into existing 2' x 2' suspended drop tile ceiling grid systems. They may also
retrofit in a 2' x 4' ceiling grid by installing cross tees. Cloudscape® ceiling tiles may also be
ordered as a full 24" x 24" size, un-backed for adhesive mounting directly to walls or ceilings.
• Ordinary ceilings take on new levels of visual excitement with these sculptured tiles. They are
available in five different patterns plus a non-patterned look to enable you to "mix and match"
for your own designs.

Available Sizes:
24" x 24" (nominal)
Specify grid when ordering:
9/16 or 15/16
  BAFFLES AND
• BANNERS
Baffles and Banners are designed to solve acoustical problems economically in any large
cubic volume space such as arenas, gymnasiums, theaters, restaurants, and auditoriums.
Reverberation times that range from 4 to 9 seconds can be reduced to 1/2 to 2 seconds.
Speech intelligibility is greatly improved and sound intensity levels are reduced
simultaneously by 3 to 12 decibels.
BANNERS:
BAFFLES:
•Baffles are an economical way to •Speech intelligibility is greatly
reduce sound pressure levels and lower improved and sound intensity levels
reverberation times in large spaces such can be simultaneously reduced by 3 to
as 12 decibels.
gymnasiums, theaters, restaurants, healt •Banners are suspended from
h and fitness clubs, etc. Reverberation ceilings, bar joists or pre-engineered
times can be lowered from a RT60 of 4 - suspension systems. They are designed
9 seconds down to a RT60 of 0.5 - 2 to hang in a horizontal or in a catenary
seconds. Speech intelligibility is greatly fashion using edge stiffeners or deck
improved and sound intensity levels can mounted flat with washer plates
be simultaneously reduced by 3 to 12
decibels.
•These baffles are easily suspended from existing open truss and pre-
engineered suspension systems. They are designed to hang in a
vertical fashion, allowing free flow of air and integrate exceptionally
well with existing sprinklers, lighting and HVAC systems.
  SOUND DIFFUSERS
• These devices reduce the intensity of sound by scattering it over an expanded area, rather than
eliminating the sound reflections as an absorber would. Traditional spatial diffusers, such as
the polycylindrical (barrel) shapes also double as low frequency traps. Temporal diffusers,
such as binary arrays and quadratics, scatter sound in a manner similar to diffraction of light,
where the timing of reflections from an uneven surface of varying depths causes interference
which spreads the sound.
PYRAMIDAL DIFFUSER
QUADRA PYRAMID
DIFFUSERS •This traditional industry workhorse
disperses sound uniformly over a
generates a uniform
broad frequency range. A quick
polar response over a broad frequency
solution to reduce flutter echo.
range using a pre-rotated pyramidal
pattern to create 16 angles of reflection.

DOUBLE DUTY DIFFUSER QUADRATIC DIFFUSER

•These Polycylindrical A true quadratic
Diffusers do twice the residue diffuser
work. They scatter sound designed for uniform
and function as a bass broadband
trap. scattering and
reducing High-Q
reflections.
  NOISE BARRIERS
These materials range from dense materials to block the transmission of airborne sound to
devices and compounds used to isolate structures from one another and reduce impact noise.

BARRIERS COMPOSITES
• Sound barrier materials are used to •Composite materials are manufactured
reduce the transmission of airborne from combinations of various materials
sound. The BlockAid® series of from open and closed celled foams to
products include the standard one quilted fiberglass and barrier. These
pound per square foot non products are used to block and absorb sound
reinforced barrier, transparent for machine enclosures as well as blocking
material when observation or airborne sound and impact noise. Some of
supervision is required, reinforced these products include Composite Foams,
vinyl to create a hanging barrier StratiQuilt Blankets and Floor
partition. Underlayment.

VIBRATION CONTROL

•Vibration control products are used to absorb vibration energy and

prevent structural noise transmission. These include vibration damping
compounds and vibration pads, isolation hangers, and resilient clips. They
improve sound transmission loss.
  FABRICS
• Acoustical fabrics are typically used to either absorb sound or as a cover for acoustical panels.
Some fabrics can also be used as a speaker grill cloth or as a finish on other types of materials.

SOUND CHANNELS WALL FABRICS GUILFORD OF MAINE

•Acoustical wall fabric is a dimensional fabric that •Guilford of Maine® Fabric is and
offers excellent acoustical properties, unmatched acoustically transparent fabric used to
fade resistance, and a fire/smoke retardant class A cover many of our products including
rating. Sound channels® is resistant to acoustical wall panels, diffusers, and
moisture, mildew, rot, bacteria, and is non- corner traps. Fabric is also sold separately
allergenic. Produced with no voc’s (volatile as speaker grill cloth, wall covering and for
organic compounds), ods’s (ozone depleting other field applications.
substances), heavy metals or formaldehyde, it's the
perfect acoustic fabric for
offices, classrooms, conference centers or any area
where speech intelligibility is a critical factor.
ACOUSTICAL BOARDS
Advantages

• Trade catalogs contain detailed

specifications
• Easy installation and maintenance
• Flexible absorption

Disadvantages

• Difficult to conceal joints between units

• Soft structure subject to damage
• Paint redecoration harmful to absorption
Disadvantages
THANK YOU.