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How And Why Soundblox Works
Soundblox
derive their excellent sound absorption from a unique cavity-slot
resonator that function as damped (Helmholtz) resonators - employing
the same principle of sound absorption as that used in automobile
mufflers. In effect, the specially designed metal septa in Type
Q which reflects the high frequencies has two resonators in each
block cavity. Tunes to different frequencies on octave and more
apart, these dual resonators greatly widen the frequency band where
very high sound absorption is obtained. This level of absorption
has been extended even further in the new type RSC units by the
use of fibrous filler and sequential cavities moulded right into
the blocks. In addition to sound absorption, Soundblox walls also
have a superior sound transmission loss performance rating when
compared to walls of ordinary hollow concrete block of similar composition.
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A
hard wall surface can reflect and amplify the noise within the room.
These noise can also be transmitted through the wall |
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Soundblox
has the 2-in-1 function:
1. With Soundblox, the noise in the room will be effectively absorbed
thus reducing the noise level within the room.
2. Soundblox also reduce the noise transmitting through the wall. |
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Types of Soundblox Available |
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Benefit
Of Soundblox
·
Superior Sound Absorption & Transmission loss properties.
· Serves as "Two-In-One" Construction - A partition wall with built-in
sound absorption, eliminating the need for a separate acoustic treatment.
· Saves labour, cost and construction time.
· Suitable for both indoor and outdoor settings or wet and dry applications.
· Tough and durable.
· Able to withstand high impact and abuse.
· Fire rated up to 2 hours tested in accordance to BS 476: Pt 22 testing
standards.
· Washable and maintenance free.
· Easily constructed and used interchangeable with ordinary hollow
concrete blocks.
· Aesthetically rugged, either in bare or painted finish. |
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Area Where
Soundblox Should Be Considered
·
Gymnasiums/ Sport Halls
· Auditoriums · Multi-purpose Halls
· Mechanical Equipment Rooms
· A.H.U. Rooms
· Generator Rooms
· Factory Production Areas
· Hangars
· Subway and Subway Station
· Tunnel · Highway Noise Screens
· Radio & Television Studios
· And many other outdoor & indoor areas where noise control is required.
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Sound Absorption Coefficient |
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The
sound absorption data was determined by tests conducted at Geiger
and Hamme Acoustical Laboratory in strict compliance with ASTM C 423
specifications. Actual installed performance may vary. |
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Sound Transmission Class
(STC) |
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The
sound transmission class values shown above were determined in accordance
with ASTM methods by ETL Laboratories in Cortland, NY. The Soundblox
wall was sealed on the unslotted side using two coats of THOROSEAL
® before testing. Actual installed performance may vary. |
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Soundblox In Reinforced
Masonry |
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Suggested Specification
For Soundblox Acoustical Concrete Masonry Units |
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| Product |
Soundblox
Acoustical Concrete Masonry Units |
| Type |
RSC
Size 4, RSC Size 6, Q Size 8 |
| Nominal
Dimension and Weight |
Size
4 shall be 100 x 200 x 400mm and weighs approx. 9.3 kg
Size 6 shall be 150 x 200 x 400mm and weighs approx. 14.0 kg
Size 8 shall be 200 x 200 x 400mm and weighs approx. 18.6 kg |
| Slots |
-
Type Q shall be of 1/4" wide, flared.
- Type RSC shall be of 3/4" wide, flared. |
| Filler
Elements |
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Type Q shall have a bare metal septum.
- Type RSC shall have fabricated incombustible fibrous material
having metal septa laminated to one side installed with septa
facing away from the slots. |
| Absorption
Coefficients |
Sound
absorption shall be in accordance with ASTM C-423.
Type_______ Size_______ Hz________ Coef.______ NRC_______
(where specific noise problem is noted.) |
| Installation |
Soundblox
units may be installed in either running bond or stacked bond.
Erection procedures are essentially the same as those for ordinary
concrete masonry units. The closed ends of the cavities must
be on the top of the units when installed in the wall, and a
full horizontal bed of mortar must be used for optimum sound
transmission loss and optimum sound absorption. The slots shall
be exposed to the area where the sound absorption is desired.
All necessary cutting on the job site shall be performed with
power tools in such manner as to provide straight and true edges.
No chipped or broken blocks shall be used. Care shall be taken
to ensure that the slots are kept free of mortar or debris.
Soundblox workmanship shall conform to all requirements of the
General Specifications for masonry work. |
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