Blade Dampers and Noise Generation

Noise generated in blade dampers

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The noise generated in a single opposed blade damper can be estimated from the chart below:

blade dampers noise generation diagram

(1 mm water H₂O) = (9.81 Pa) = (9.81 N/m²) = (1 kg/m²) = (0.0736 mm mercury) = (0.9677 10^-4 atm) = (0.00142 psi)

The noise level generated depends on the volume flow through the damper and can be corrected using the table below

Volume Flow (m³/h)	Noise Correction (dB)
100	-10
200	-7
500	-3
1000	0
2000	3
4000	6
8000	9
16000	17

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