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 because of the variable conditions that the device applies.
It’s been a while since I had a fan that can go up to 35 dBA, meaning I have to test four different levels.
20 dBA Noise Output
Not so good performance at low speeds.
25 dBA Noise Output
Performance doesn’t impress me at 25 dBA normalized output.
30 dBA Noise Output
We reached 30 dBA, but performance is still at the lower places of my graphs.
35 dBA Noise Output
I don’t have many 35 dBA capable fans, and admittedly, this is a pretty high level for most users. The fan performs decently here in airflow, but its static pressure is not that high.
