Frequency Plots
40% Fan Speed
The peak frequency is at 500 Hz.
50% Fan Speed
At low frequencies, there is a spike at 50 Hz.
75% Fan Speed
The 400 Hz frequency is the highest one.
100% Fan Speed
The highest frequencies are from 400 to 500 Hz.
Signal Recordings
I have recorded the signals shown above, but please keep in mind that I’ve enabled Automatic Gain Control (AGC) to do so to make it easier for you to reproduce them. The provided recordings are only offered for aural identification purposes.
40% Fan Speed
50% Fan Speed
75% Fan Speed
100% Fan Speed
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“Lower is better” in “Average Watt” chart: is it correct?