Lu, if you have access to an SDR receiver that can record it's output
on a PC, it might be easier that using a noise source.

When comparing several microphones and headsets on my K3, I used a
Perseus SDR to play back the results for A/B/C/D comparison in order
to pick the best equaliser/mic combination. The saved files from the
Perseus were labelled to match the microphone and can be played back
very easily, in addition, recording a wide chunk of frequency means
the bandwidth can easily be checked if that might be an issue.

73 Dave
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