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All Rights Reserved |
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| Extruded Aluminum Louvers Formed Metal Specialized Other Products Accessories |
| Acoustical Louvers Adjustable Blades Thin Line Louvers Sightproof Louvers |
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Acoustical louvers are multi-purpose louvers that can be used to permit the flow of air while providing excellent sound attenuation and protect the environment from noise pollution. Sound ratings are available from tests conducted by Riverbank Acoustical Laboratories, Geneva, IL, for most models and comply with the following standards: "Recommended Practice for Laboratory Measurement of Airborne Sound Transmission Loss of Building Partitions," ASTM Designation E90-75, and "Standard Classification for Determination of Sound Transmission Class," ASTM Designation E413-73. |
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| MODEL |
FREQUENCY |
BLADE THICKNESS |
FRAME THICKNESS |
LOUVER DEPTH |
FREE AREA
4" X 4" LOUVER |
| 125 |
250 |
500 |
1000 |
2000 |
4000 |
5000 |
| TL |
FNR |
TL |
FNR |
TL |
FNR |
TL |
FNR |
TL |
FNR |
TL |
FNR |
TL |
FNR |
| 680A |
6 |
12 |
4 |
10 |
7 |
13 |
13 |
19 |
16 |
22 |
14 |
20 |
13 |
19 |
Blade .080" & Perf .032" |
.080" |
6" |
4.7 sq. ft. (29%) |
| 880A* |
6 |
12 |
5 |
11 |
9 |
15 |
13 |
19 |
17 |
23 |
12 |
18 |
11 |
17 |
Blade .080" & Perf. .032" |
.080" |
8" |
4.52 sq. ft. (28%) |
| 880AA* |
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Blade .080" & Perf. .032" |
.080" |
8" |
5.28 sq. ft. (33%) |
| 1280A* |
9 |
15 |
8 |
14 |
11 |
17 |
17 |
23 |
16 |
22 |
14 |
20 |
13 |
19 |
Blade .080 & Perf. .032" |
.080" |
12" |
4.00 sq. ft. (25%) |
| 1280AA* |
8 |
14 |
7 |
13 |
12 |
18 |
15 |
21 |
13 |
19 |
12 |
18 |
12 |
18 |
Blade .060" & Perf. .032" |
.080" |
12" |
4.61 sq. ft. (29%) |
| 1280AAXP |
6 |
12 |
6 |
12 |
8 |
14 |
11 |
17 |
9 |
15 |
8 |
14 |
8 |
14 |
Blade .060" & Perf. .032" |
.080" |
12" |
6.18 sp. ft. (39%) |
| TL=Transmission Loss FNR=Field Noise Reduction *Also available in steel. |
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