First, the definition of microphone:

The microphone is an acoustoelectric transducer (also referred to as a transducer or sensor) and is the exact opposite of the horn. Is the two terminals of the sound device, the microphone is the input, the speaker is the output.

Second, the classification of the microphone:

1, divided from the principle of work: carbon fine particles, electromagnetic, capacitive, electret capacitance, piezoelectric crystal, piezoelectric ceramic, silica type.

2, from the size of points, the electret can be divided into several. Φ9.7 series Φ8 series Φ6 series Φ4.5 series Φ4 series Φ3 series of products in each series have different heights

3, from the direction of the microphone, can be divided into omnidirectional (no direction), one-way, two-way (also known as de-noising)

4, from the polarization on the points, diaphragm, back pole, front pole from the structural points can be divided into gate spot welding, grid crimping, pole ring connection type.

5, from the external connection sub-ordinary solder point type: L-type with PIN pin: P-type Concentric: S / A type.