Microphone is a transducer acoustic-to-electric sensors used transform and change the sound signals into electrical signals. In principle, the microphone is a system of vibration of the membrane, which vibrates due to the membrane exposed to sound pressure. Microphone have many different types, some types are classified by the transduction system. Condenser microphones and dynamic microphones are two of the examples that many people use the microphone.
Condenser microphone is a microphone that works with the principle of keeping parallel capacitor, or the difference in capacitance between the charged plate. The membrane is very thin on the microphone and made of plate or metal. Behind there is membrane electrode made of metal as well, the two plates are separated by a column of air. When the membrane exposed to sound field, the membrane will vibrate, the vibration of the membrane will change the distance of plate, or column of air between the plate that resulted in the emergence of differences in capacitance. Then the difference described as disappointing as electrical signals.
Dynamic microphones are often also called electromagnetic microphone, because it works based on these principles. A wire coil made of a very small email attached to the membrane and placed in a magnetic field. Vibration caused by because of the membrane exposed to sound field will move the coil in a magnetic field, the emergence of electric current response as the voice signal.
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