Normalized Noise Tests
For these tests, I set the fan to speeds with noise output at the following predefined levels: 20/25/30/35/40/45 dBA. I skip the corresponding tests if the fan under the test cannot reach some noise levels. The speeds shown in the graph below are measured with the fan in a clear space inside my hemi-anechoic chamber without any obstacles. I set these speeds on the Longwin machine, but they slightly change due to the variable conditions applied by the device.
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In reverse, the fan is notably noisier, so it extends to more normalized noise levels.
20 dBA Noise Output
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| Normal Operation | Reverse Operation |
| Mid speed | Low speed |
| Low airflow | Low airflow |
| Low static pressure | Low static pressure |
| High power consumption | Low power consumption |
25 dBA Noise Output
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| Normal Operation | Reverse Operation |
| Mid speed | Low speed |
| Low airflow | Low airflow |
| Mid static pressure | Low static pressure |
| High power consumption | Low power consumption |
30 dBA Noise Output
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| Normal Operation | Reverse Operation |
| Mid speed | Low speed |
| Low airflow | Low airflow |
| Low to mid static pressure | Low static pressure |
| Increased power consumption | Low power consumption |
35 dBA Noise Output
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- Low speed
- Low airflow
- Low static pressure
- Low power consumption
40 dBA Noise Output
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- Low speed
- Low airflow
- Low static pressure
- Low power consumption
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