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.
Lately, we discovered a peculiarity of the Longwin apparatus, so we are re-testing every fan we have, and we will continue to double-check all results because it seems the Longwin’s fan controller doesn’t “like” speed control for these tests, but it works better with PWM control. This is why you will find differences with results listed in previous reviews; we constantly update the noise-normalized tests to make them as accurate as possible!
20 dBA Noise Output
Fan speed is not that high, showing a non-optimized noise design. Airflow is decent, while static pressure is low. The less expensive Arctic fan leads, while the Ageras 12 ARGB achieves the best static pressure.
25 dBA Noise Output
Fan speed remains low, CFM performance is good enough, and static pressure remains dead low. The Ageras 12 performs exceptionally well in static pressure.
30 dBA Noise Output
Low speed, high enough airflow, and low static pressure. I noticed something weird in this chart regarding the Ageras fan. It achieves a better static pressure at 30 dBA than at 35 dBA! I measured two fans of this model multiple times, and the results were the same. I will evaluate a third sample at some point to see if the results will remain the same. This is the only fan from the many ones I have evaluated so far with this behavior.
