Frequency Plots
10 – 30% Fan Speed
- Ignore the 50 Hz noise from the mains grid. The next standout frequency is at 160 Hz.
35% Fan Speed
- Peak frequency: 160 Hz
50% Fan Speed
- Peak frequency: 400 Hz
75% Fan Speed
- Peak frequency: 400 Hz
100% Fan Speed
- Peak frequency: 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.
10-30% Fan Speed
35% Fan Speed
50% Fan Speed
75% Fan Speed
100% Fan Speed
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