Frequency Plots
25% Fan Speed
From 315 to 500 Hz, noise increases compared to the rest of the frequencies.
50% Fan Speed
The 500 Hz frequency is the highest one.
75% Fan Speed
\The peak is at 500 Hz again.
100% Fan Speed
The highest frequencies are from 250 to 800 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.
25% Fan Speed
50% Fan Speed
75% Fan Speed
100% Fan Speed
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