USG Geometrix Panels Wall Mount Solution - Manual (Page 7)

7
Wall-mounted C ELEBRATION and G EOMETRIX panels, with perforation and A COUSTIBOND ® backer, can provide significant
sound absorption (NRC). The following table shows the estimated NRC of a wall-mounted assembly for each
shape and depth of G
EOMETRIX
panel (C
ELEBRATION
panels provide the same acoustical performance as 5/16
G EOMETRIX Flat panels).
Note that changing the orientation of individual panels within an assembly to create patterns does not affect
the sound absorption.
Perforation Pattern
C062 C062A C375 D250 D375
Open Area
2% 9% 10% 11% 11%
Sound Absorption – Wall-Mounted Assembly G EOMETRIX Panel Size Estimated NRC
Flat 3 0.65 0.80 0.85 0.85 0.85
2 0.50 0.55 0.65 0.65 0.65
1 0.30 0.30 0.40 0.40 0.40
5/16 0.20 0.20 0.20 0.20 0.20
(C ELEBRATION panels provide
equivalent performance)
Wedge 3 0.55 0.60 0.65 0.65 0.65
2 0.50 0.50 0.50 0.50 0.50
1 0.40 0.40 0.40 0.40 0.40
Inside Corner Wedge 3 0.55 0.65 0.70 0.70 0.70
2 0.50 0.55 0.60 0.60 0.60
1 0.45 0.45 0.45 0.45 0.45
Outside Corner Wedge 3 0.50 0.55 0.60 0.65 0.65
2 0.40 0.45 0.50 0.50 0.50
1 0.35 0.35 0.35 0.35 0.35
NRC estimated based on testing per ASTM C423, Standard Test Method for Sound Absorption and Sound
Absorption Coefficients by the Reverberation Room Method.
Panels affixed with Type A mount per ASTM E795, Standard Practices for Mounting Test Specimens During
Sound Absorption Tests.
Acoustical Performance
wall
wall panel