Frequency Plots
20% Fan Speed
50 Hz and 200 Hz are the highest at low frequencies, while noise is about the same in mid and high frequencies.
25% Fan Speed
Notable spikes are at 50 Hz, 63 Hz, and 400 Hz.
50% Fan Speed
The 400 Hz spike is the highest.
75% Fan Speed
The highest frequency is at 800 Hz.
100% Fan Speed
Again, the noisiest frequency is 800 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
50% Fan Speed
75% Fan Speed
100% Fan Speed
Pages:
