Output Noise
We used a CEM-8852 Sound DB Meter we installed 50 cm away from the NAS for these measurements. Ambient noise in our lab was below 30 dBA while these noise measurements were taken.
This is a very silent NAS, even while its fan is set to high-speed mode. You will barely hear it operate under normal conditions. As it seems, the aluminum enclosure plays its part in removing any internal heat build up.
Output Noise Comparison Graphs
The following graphs show the output noise of the F2-220 and compare it to that of other units we have tested in the past.