Frequency Plots
| Fan / Pump Speed (PWM) | Peak Frequency |
|---|---|
| Fan 20% | 315 Hz |
| Fan 30% | 500 Hz |
| Fan 40% | 630 Hz |
| Fan 50% | 630 Hz |
| Fan 60% | 500 Hz |
| Fan 70% | 400 Hz |
| Fan 80% | 630 Hz |
| Fan 90% | 630 Hz |
| Fan 100% | 500 Hz |
20% Fan Speed
- Peak frequency: 315 Hz
30% Fan Speed
- Peak frequency: 500 Hz
40% Fan Speed
- Peak frequency: 630 Hz
50% Fan Speed
- Peak frequency: 630 Hz
60% Fan Speed
- Peak frequency: 500 Hz
70% Fan Speed
- Peak frequency: 400 Hz
80% Fan Speed
- Peak frequency: 630 Hz
90% Fan Speed
- Peak frequency: 630 Hz
100% Fan Speed
- Peak frequency: 500 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.
20% Fan Speed
30% Fan Speed
40% Fan Speed
50% Fan Speed
60% Fan Speed
70% Fan Speed
80% Fan Speed
90% Fan Speed
100% Fan Speed
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