Frequency Plots
| Fan / Pump Speed (PWM) | Peak Frequency |
|---|---|
| Fan 20% | 2.5 kHz |
| Fan 30% | 3.15 kHz |
| Fan 40% | 400 Hz |
| Fan 50% | 500 Hz |
| Fan 60% | 630 Hz |
| Fan 70% | 500 Hz |
| Fan 80% | 400 Hz |
| Fan 90% | 630 Hz |
| Fan 100% | 500 Hz |
| pump 50% | 160 Hz |
| pump 75% | 500 Hz |
| pump 100% | 630 Hz |
20% Fan Speed
- Peak frequency: 2.5 kHz
30% Fan Speed
- Peak frequency: 3.15 kHz
40% Fan Speed
- Peak frequency: 400 Hz
50% Fan Speed
- Peak frequency: 500 Hz
60% Fan Speed
- Peak frequency: 630 Hz
70% Fan Speed
- Peak frequency: 500 Hz
80% Fan Speed
- Peak frequency: 400 Hz
90% Fan Speed
- Peak frequency: 630 Hz
100% Fan Speed
- Peak frequency: 500 Hz
50% Pump Speed
- Peak frequency: 160 Hz
75% Pump Speed
- Peak frequency: 500 Hz
100% Pump Speed
- Peak frequency: 630 Hz
- 2nd 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 only offered for aural identification purposes.
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
50% Pump Speed
75% Pump Speed
100% Pump Speed
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