What Is Electret Earphone?

- Aug 20, 2018-

The electret earphone is also called a stationary electrostatic earphone, and its diaphragm itself is polarized or polarized by an electrostatic field emitted by a polarized substance outside the diaphragm, and no special equipment is required to provide a polarization voltage. The electret earphones have most of the characteristics of the electrostatic earphones, but the electrets are gradually depolarized and need to be replaced, and their life span is about 5-10 years.


