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| Frequency (Hz) & Condition | 63 | 125 | 250 | 500 | 1000 | 2000 | 4000 | 8000 | 10000 |
|---|---|---|---|---|---|---|---|---|---|
| Empty Duct | |||||||||
| Static | 65.0 | 71.0 | 95.5 | 97.0 | 90.5 | 90.5 | 77.5 | 60.5 | 84.5 |
| 3m/s | 65.5 | 71.5 | 95.5 | 97.0 | 90.5 | 90.5 | 77.5 | 60.5 | 84.5 |
| 6m/s | 66.5 | 71.0 | 95.5 | 97.0 | 90.5 | 90.5 | 78.0 | 60.5 | 84.5 |
| 9m/s | 68.5 | 71.5 | 95.5 | 97.0 | 90.5 | 91.0 | 78.0 | 60.5 | 84.5 |
| With Silencer | |||||||||
| Static | 64.5 | 70.5 | 87.5 | 82.5 | 72.5 | 79.5 | 69.0 | 55.5 | 69.5 |
| 3m/s | 64.5 | 71.0 | 87.5 | 82.5 | 71.5 | 79.5 | 69.5 | 55.0 | 69.5 |
| 6m/s | 66.0 | 70.5 | 87.5 | 93.0 | 71.5 | 79.5 | 70.0 | 55.0 | 70.0 |
| 9m/s | 68.0 | 71.0 | 87.5 | 93.0 | 71.5 | 80.0 | 70.0 | 55.0 | 70.0 |
| Silencer (Insertion Loss) | |||||||||
| Static | 0.5 | 0.5 | 8.0 | 14.5 | 18.5 | 11.0 | 8.5 | 5.0 | 15.0 |
| 3m/s | 1.0 | 0.5 | 8.5 | 14.5 | 19.0 | 11.0 | 8.0 | 5.5 | 15.0 |
| 6m/s | 0.5 | 0.5 | 8.0 | 14.0 | 19.0 | 11.0 | 8.0 | 5.5 | 14.5 |
| 9m/s | 0.5 | 0.5 | 8.0 | 14.0 | 19.0 | 11.0 | 8.0 | 5.5 | 14.5 |
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