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
Thanks to the different fan blade design, the TL 140mm achieves higher rotation speeds than the LCD version. The airflow performance is top, but the static pressure is low. The power consumption is also low.
25 dBA Noise Output
High enough speed, top airflow, but low static pressure. Power consumption is also low, which is good.
30 dBA Noise Output
Increased speed, good airflow, low static pressure, and low power consumption.
