Frequency Plots
10% Fan Speed
- Ignore the 50 Hz spike. This is noise coming from the mains grid.
25% Fan Speed
- The 500 Hz frequency stands out.
50% Fan Speed
- Peak frequency: 315 Hz
75% Fan Speed
- Peak frequency: 500 Hz
100% Fan Speed
- Peak frequency: 1 kHz
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.
10% Fan Speed
25% Fan Speed
50% Fan Speed
75% Fan Speed
100% Fan Speed
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