The Bare Bones Camera Course for Film and Video by Tom Schroeppel

Author:Tom Schroeppel
Language: eng
Format: epub
Publisher: Allworth Press
Published: 2014-12-31T16:00:00+00:00

In a dynamic microphone, the vibrating diaphragm moves a coil of wire inside a permanent magnet, creating an electric current. The current varies according to the strength and frequency of the sound waves moving the diaphragm. Dynamic microphones are very rugged and can produce excellent sound. They’re sometimes called moving coil microphones.

The diaphragm of an electret condenser microphone is actually one plate of a condenser, or capacitor. The diaphragm/plate and another plate hold an electric charge between them. As the diaphragm vibrates to sound waves, changing the distance between the two plates, a tiny electric current is created, varying according to the sound waves. A battery supplies power to amplify the signal to a usable level.

Because, unlike dynamic mikes, they don’t contain heavy permanent magnets, condenser mikes can be made very small and lightweight. They can produce excellent sound. However, they do require batteries, which wear out and die. So carry backups.

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