How ribbon microphones work?!

1. Ribbon consist of an extremely thin aluminium foil placed between two neodymium magnets which vibrates with sound waves, The movement of the ribbon in the magnetic field generates a small electromotive force (emf) which can be detected using two wires connected to the ribbon.
2.This signal is so weak so we use a transformer to step-up the voltage.
3.The output of the transformer is now ready to send through XLR cables to preamps.