How electrostatic headphones work

How they work

Electrostatic headphones have thin and lightweight diaphragms that vibrate inside in an electrostatic field. They can reproduce music with great detail and low distortion, because the response time is very fast. A separate high-voltage DC power supply ("energizer") polarizes the diaphragm, which is suspended between two metal plates called stators. The polarizing (or bias ) voltage supply is most often AC-based, but there are battery-powered energizers.