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Proudfoot Architectural Acoustics
The Proudfoot Company, Inc. is an industry leader in acoustical correction and noise control. Since 1965, Proudfoot has worked with architects and engineers to control noise levels on a wide variety of projects through the incorporation if its SOUNDBLOX products. Tens of millions of these popular units are in place around the world today.
An Introduction to SOUNDBLOX
SOUNDBLOX units are the solution to acoustical correction and noise control problems in masonry construction. Attractive, economical, and efficient sound absorbing units, SOUNDBLOX are made locally near the jobsite by carefully selected quality concrete block producers. These producers employ exclusive Proudfoot molds designed to fit standard automatic block machines -- thereby assuring uniform quality and acoustical efficiency of each SOUNDBLOX unit.
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A Close Up Look at SOUNDBLOX
SOUNDBLOX derive their excellent sound absorption from a unique cavity-slot resonator construction. The cavities are closed at the top and the slots allow the cavities to function as damped (Helmholtz) resonators -- and excellent sound absorption tool at low frequencies. The slots of the RSR, RSC and Q Type units are funnel-shaped for superior acoustical performance.
The amount of sound absorbed by properly installed SOUNDBLOX is increased dramatically when units incorporating a metal septum (membrane or divider) and fibrous filler in the cavity are specified. Together with funnel-shaped slots, these units provide higher levels of sound absorption across a wider range of frequencies. In addition to sound
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absorption, SOUNDBLOX walls have a superior sound transmission loss (STL) performance when compared to walls of ordinary hollow concrete blocks of similar composition.
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SOUNDBLOX Masonry Units are Structural and Load-Bearing
SOUNDBLOX have the same compressive strength as standard hollow concrete masonry units of similar composition. Installed conventionally with little or no added labor, the in-place cost of SOUNDBLOX is low by comparison to most other acoustic materials. Rugged and durable in construction, SOUNDBLOX masonry units are an excellent choice for industrial settings, gymnasiums, mechanical equipment rooms, and comparable installations. |
| FREQUENCY -- HERTZ |
| Size |
Type |
125 |
250 |
500 |
1000 |
2000 |
4000 |
STC |
| 6" |
A-1 |
38 |
38 |
44 |
51 |
58 |
58 |
49 |
| 8" |
RSC |
36 |
44 |
50 |
54 |
58 |
56 |
53 |
| 12" |
RSC/RF |
45 |
46 |
52 |
58 |
62 |
61 |
56 |
| 12" |
RSC/RF* |
44 |
48 |
57 |
65 |
67 |
67 |
60 |
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The sound transmission loss values shown above were determined in accordance with ASTM methods by ETL Laboratories in Cortland, NY, and Riverbank Laboratories in Geneva, IL. The SOUNDBLOX walls were sealed on the unslotted side using two coats of Thoroseal® before testing. * This wall was tested with the two rear cores filled with sand.
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SOUNDBLOX®
General Information
