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

The noise level depends on the volume flow through the damper and must be corrected according 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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