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The Mechanism and Functioning of a Condenser Microphone

Jun 17, 2008
What is a condenser microphone? This is the microphone where a capacitor is used; so, it is also known as capacitor microphone. All the microphones work on the same principle of a diaphragm receiving the sound or music and converting it into electrical signals. The diaphragm, in the case of condenser microphones, is positioned in a way where it acts as a capacitor and the distance between the plates is changed by the generated vibrations.

An electronic transducer is formed which is used for music creation. The audio, which is encoded in this form of transducers, can be extracted. Two different methods are used for this purpose. One is known as the DC based and the other one is known as RF or HF condenser microphones.

The condenser microphone needs power from a battery or any external power source. The audio signal that is extracted is stronger than that obtained by any dynamic process. The signal is also more likely to be more sensitive and receptive than dynamics.

External power source is provided with the professional microphones to suit the needs of the buyers. For useful output, power is one requirement that cannot be overlooked. In addition, the condenser microphone functions with two diaphragms. This type of microphone is much suitable in picking up feeble and distinct sound in and around it. For noisy works, however, they are not the favorites because of their over sensitiveness.

The plates of a DC based microphone are powered by a set charge; so, when vibrations occur, the voltage also changes. A mathematical equation is used to calculate it.

When the distance of a capacitor microphone changes, the capacitor charge also varies a little bit. For this reason, a constant charge is maintained for the capacitor. Maintaining the time frame of the change in the capacitance, the voltage regulating is instantaneous. It shows the alteration that has occurred in the capacitance. The series resistor then shows the voltage variation between the bias and the capacitor.

RF condenser microphone is just the opposite of the DC biased condenser microphone. RF microphones use a low RF voltage built up by a low noise oscillator. Frequency modulation produced by the sound waves is the guide force behind the movement of the oscillator.

The demodulation results in a very low source obstacle. It also produces low sound audio frequency signal. The RF biased condensers are used in damp conditions also.

Condenser microphones are used to make a number of appliances. It is capable of producing good quality music signals. It is also very popular in the field of studio recordings and laboratories.
About the Author
Victor Epand is an expert consultant for music gear, speakers, and microphones. You can find the best marketplace for music gear, speakers, and microphones at these 3 sites: music gear, music equipment, speakers, and laser microphones, condenser microphone.
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