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Allan Block Fence Construction:
Typical Transmission Loss by Material Chart

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Typical Transmission Loss by Material
Material Thickness
Inches (mm)		 Surface
Area Weight
lbs/ft2 (kg/m2)		 Transmission
Loss, dB
AB Fence™:
Concrete Block

 5.6 (142.2) 36 (175.8) 32
Concrete:
Light Weight

 4.0 (101.6)
6.0 (152.4)		 40 (195.3)
60 (293.0)		 36
39
Concrete:
Sand-Gravel

 4.0 (101.6) 48 (234.4) 40
Masonry:
Concrete Block

 3.6 (91.4)
5.6 (142.2)		 22 (107.4)
33 (161.1)		 32
36
Masonry:
Clay Brick

 3.6 (91.4)
5.6 (142.2) 		36 (175.8)
56 (273.4)		 40
47
Wood:
Pine

 0.5 (12.7)
2.0 (50.8)		 1.5 (7.3)
6.2 (30.3)		 16
23
Wood:
Redwood

 0.5 (12.7)
2.0 (50.8)		 1.1 (5.4)
4.3 (21.0)		 16
23
Wood: Cedar

 0.5 (12.7)
2.0 (50.8)		 1.1 (5.4)
4.3 (21.0)		 15
22
Metal:
Aluminum

 0.06 (1.5)
0.25 (6.4)		 0.9 (4.4)
3.6 (17.6)		 23
27
Metal:
Steel

 0.03 (0.8)
0.06 (1.5)		 1.3 (6.4)
2.6 (12.7)		 15
22
Transmitted noise through the wall is a characteristic of the barrier material, determined by weight and stiffness and can be compared on the basis of transmission loss. The table shows that transmission loss by dense materials is most effective at stopping noise.





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