Transistorverstärker Nachtrag, Mikrofonverstärker, Mikrofontypen, offene Fragen

Calculation of a transistor stage with current negative feedback reloaded. What are the special requirements for a microphone amplifier? Unfortunately, the calculation of the input resistance is not entirely correct. There is a correction in this video:    • Rückblick 2022 - Fehlerkorrektur - Komment...   0:00 - preface 0:34 - A little repetition 8:20 - microphone types 11:57 - microphone adjustment 13:58 - Selection of the transistor 16:23 - Integrated solutions