micropohne capsul how much VDC?

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Mic self-noise tested with an Apollo Twin X I started with 10 dB input gain and it then increased step by step up to 21 dB it noises in any case more than all my brown mics there is a trick to reduce the self-noise other components or yet another
I just saw that the values are different than yesterday. The membrane has warped again, but after 10 minutes it's back again, very strange? left side
View attachment Ohne Namen 14#31_bip_1.wave capsuleand
 

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