1. According to the energy energy principle (Transducer)

 They are mainly moving coil (Dynamic) and static electricity (Electrostatic) earphones. Although there are several other magnetic types, but they have been eliminated or used for professional use market share.

 Principle of moving coil earphone: at present, most of the (more than 99%) earphone earplugs belong to this kind, the principle is similar to the ordinary sound box, the coil in the permanent magnetic field is connected with the diaphragm, the coil is driven by the signal current to drive the diaphragm to sound.

Electrostatic earphone: the diaphragm is in the changing electric field, and the diaphragm is extremely thin and accurate to a few microns (the current STAX new generation of electrostatic earphone diaphragm has been accurate to 1.35 microns), and the coil drives the diaphragm to sound driven by the electric field force.

2: By the degree of openness

 Mainly open, semi-open, closed (closed)

 Open earphones generally feel natural and comfortable, common in the home appreciation of HIFI earphones, sound can be leaked, otherwise can also hear the outside sound, the earphone has less pressure on the ear.

Semi-open: there is no strict regulation, the sound can only in not out also can only out into, according to the need and make corresponding adjustments.

Closed: the earmuffs presses the ear to prevent sound access, the sound correct positioning is clear, more common in the field of professional monitoring, but this kind of earphone has a disadvantage is that the bass sound is serious,

3: By purpose

Mainly home (Home), portable (Portable), listening (Monitor), mixing (Mix), human head record (Binaural Recording)