Frequency Plots (Mid Speed)
10% Fan Speed
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There is a high spike at 63 HZ and another one, not as high compared to the nearby frequencies, at 2 KHz.
25% Fan Speed
The highest spike is at 200 Hz.
50% Fan Speed
The dominant frequency is at 400 Hz.
75% Fan Speed
The 800 Hz to 1.25 KHz has increased noise.
100% Fan Speed
The highest spike is at 315 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% Fan Speed
25% Fan Speed
50% Fan Speed
75% Fan Speed
100% Fan Speed
Pages:
When a test of the Noctua IPPC 140mm 3000RPM for have a fan to compare it ? 🙂
Sent an email to Noctua and weirdly enough I didn’t get a reply. Will talk again to my contact there.