When recording the self noise of an OctoMic using the
Millennia Media HV-316 and Zoom F8 (both with 30 dB of
gain), while the time domain noise levels look roughly equivalent,
their noise spectra are quite different. That's what accounts for
the degradation when using the Zoom F8.
At low frequencies (below 250 Hz), the F8 is five to ten dB worse
than the HV-316. At higher frequencies (1 kHz to 20 kHz) it's around
5 dB worse.
You can see the noise spectra here:
https://u.pcloud.link/publink/show?code=kZPTocVZ53w7P5SUFM5dsF0QpHlmvH6sPR8X
So the Zoom F8 penalizes mics that use low sensitivity capsules. It
makes the self noise sound much worse than it really is.
The folks who ran the comparison test seem to have overlooked this.
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