Microphones are generally classified according to the way they are converted. Here, we divide the microphone into dynamic microphone and condenser microphone according to the general classification of microphone in recording room.

Dynamic microphone

A microphone that produces an electrical signal from a conductor moving in a magnetic field. It is the vibration of the coil driven by the diaphragm, so that the coil in the magnetic field generates induced current. Features: firm structure, stable performance, durable, low price; good frequency characteristic, smooth amplitude frequency characteristic curve in the frequency range of 50-15000hz; good directivity; no DC operation voltage is required, simple application and low noise.

Condenser microphone

The diaphragm of this kind of microphone is an electrode of the capacitor. When the diaphragm oscillates, the spacing between the diaphragm and the fixed back plate changes accordingly, resulting in variable electrical capacity. This variable capacitance and the preamplifier of the microphone itself generate the signal voltage. Feature: frequency

Good performance, smooth amplitude frequency characteristic curve in the audio range, which is better than dynamic microphone; no directionality; high sensitivity, low noise, soft; high output signal level, small distortion, good transient response performance, which are the advantages that dynamic microphone can not achieve; operation characteristics are not stable, low-frequency sensitivity decreases with the increase of application time, life comparison Short, DC power supply is required during operation, which is inconvenient to use.

There is a preamplifier in the condenser microphone. Of course, there must be a power supply. Because of the volume connection, this power supply is generally placed outside the microphone. In addition to the polarization voltage supplied to the capacitor diaphragm, it also supplies the necessary voltage for the tube or transistor of the preamplifier. We call it phantom power.

Because of this preamplifier, the condenser microphone is relatively sensitive. Some auxiliary equipment that can't be used less are: shock mount (usually presented with the microphone), wind shield, blowout preventer, and high-quality microphone rack. If you want to carry out ultra close interval recording operation, a blowout preventer is indispensable.

Source: Enping Microphone http://www.liyangpro.com/