Frequency Plots
25% Fan Speed
- Peak frequency: 4 KHz (I don’t take into account 50 Hz because this is noise coming from the mains grid)
50% Fan Speed
- Peak frequency: 160 Hz
75% Fan Speed
- Peak frequency: 250 Hz
100% Fan Speed
- Peak frequency: 315 Hz
Signal Recordings
I’ve recorded the signals shown above, but please note that I’ve enabled Automatic Gain Control (AGC) to facilitate their reproduction. The provided recordings are intended for aural identification purposes only.
25% Fan Speed
50% Fan Speed
75% Fan Speed
100% Fan Speed
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