| |
Acoustical Enclosures - Tongue and Groove Systems |
|
|
IES 2000 standard Acoustical/Thermal Panels are fabricated with an 18 gauge G90 galvanized solid steel outer skin and
16 gauge galvanized solid steel channel frames filled with mineral-glass fiber acoustic/thermal fill; and are protected
Options
by an inner skin which consists of a 22 gauge G90 galvanized
perforated steel sheet with 23% open area (3/32" holes on
3/16" staggered centers).
Options:
-
Tongue & Groove
-
Mylar, Polyethylene, or Fiberglass Cloth Lining
-
Framed Cutouts/Openings
-
Primer or Finish Paint
-
Different Gauge Construction
-
Different Material Construction; i.e. Stainless Steel
-
Special Configurations: Perf/Perf, Solid/Solid, Perf/Solid/Perf
-
Different Insulation Materials and Densities
|
 |
|
|
|
|
Acoustical Performance * – Standard Construction
|
| TRANSMISSION LOSS (ASTM E90-81) |
|
Octave Band Center Frequency (Hz)
|
125 |
250 |
500 |
1K |
2K |
4K |
NRC |
4 1/4” Panel (TL in dB) |
22 |
29 |
40 |
48 |
54 |
60 |
41 |
2 1/4” Panel (TL in dB) |
21 |
24 |
35 |
43 |
52 |
57 |
37 |
|
SOUND ABSORPTION COEFFICIENTS (ANSI/ASTM C243- 81 a AND E795) |
|
1/3 Octave Band Center Frequency (Hz)
|
125 |
250 |
500 |
1K |
2K |
4K |
NRC |
4 1/4” Panel |
0.86 |
1.09 |
1.22 |
1.06 |
1.05 |
1.04 |
1.0 |
2 1/4” Panel |
0.31 |
0.82 |
1.19 |
1.12 |
1.07 |
1.06 |
1.11 |
| * All acoustical test were performed and reported by an Independent Accredited Acoustical Laboratory. Copies of the test reports can be furnished upon request. |
|
