Frequency Plots – Reverse Operation
| Fan Speed (PWM) | Peak Frequency |
|---|---|
| 20% | 200 Hz |
| 25% | 200 Hz |
| 30% | 250 Hz |
| 50% | 400 Hz |
| 75% | 630 Hz |
| 80% | 630 Hz |
| 100% | 630 Hz |
20% Fan Speed
- Peak frequency: 200 Hz
25% Fan Speed
- Peak frequency: 200 Hz
30% Fan Speed
- Peak frequency: 250 Hz
50% Fan Speed
- Peak frequency: 400 Hz
75% Fan Speed
- Peak frequency: 630 Hz
80% Fan Speed
- Peak frequency: 630 Hz
100% Fan Speed
- Peak frequency: 630 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.
20% Fan Speed
25% Fan Speed
30% Fan Speed
50% Fan Speed
75% Fan Speed
80% Fan Speed
100% Fan Speed
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