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2015-11-06
Construction Additional damping
Damp bricks around 10 dB
Coated plasterboard (double wall) around 15 dB
Armored concrete around 30 dB
Thick, damp brick wall >40 dB
Sample calculation:
A radio gateway is fitted under an armored concrete ceiling. The partition walls are
made from concrete.
Radio gateway with radio links A, B, C
Path A: 5 m Free space+armored concrete ceiling ≈40 + 30 = 70 dB
Path B: 15 m
Free space+armored concrete ceiling+concrete
wall
≈67 + 30 + 6 = 103 dB
Path C: 10 m Free space+concrete wall ≈57 + 6 = 63 dB
Result:
● Paths A and C can be used.
● The radio detector will not be reached with path B.
A
B
C
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