Noise generated in Blade Dampers
Sound power noise generated by blade dampers in ventilation systems.
The noise - sound power level - generated in single opposed blade dampers can be estimated from the chart below:
- 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 = 0.0394 in H2O
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 |
