2. Electrodynamic moving-coil microphone
2.1 Operating principle
A moving coil made up of N turns of length L (total length = NL ) placed in a field of constant radial magnetic induction B is subjected to a force F (normal to B ) and moves at speed v, intersecting the induction lines (figure 10). It is therefore the seat of an induced electromotive force e.
The coil is attached to a diaphragm with surface area S. The assembly of coil and diaphragm is called the moving assembly.
The system is closed so that only the front face is exposed to sound waves.
Placed...
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Electrodynamic moving-coil microphone
Electrostatic microphone
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