The electret mic is operating at such a low current that its impedance is 10k ohms. The 100nF capacitor in parallel with it has an impedance at 2kHz of only 800 ohms so it is a "short circuit" at a mid frequency.
The 47nF capacitor to ground is also a "short circuit" at a mid frequency.
They kiss the high audio frequencies, "Goodbye".
The 47nF capacitor to ground is also a "short circuit" at a mid frequency.
They kiss the high audio frequencies, "Goodbye".
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