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.
I don’t have any normalized fan noise data for 15 dBA since it is too low and wouldn’t make any sense. The lowest noise output I start testing is 20 dBA.
Pages:
On page 5, the 4th graph/image (static pressure) has an error, the 60% line reads 90%
That is all.
Thanks!!