An electret (formed as a portmanteau of electr- from "electricity" and -et from "magnet") is a dielectric material that has a quasi-permanent electrical polarisation.

An electret, for example, lines up in an electric field with its positive end pointing in the direction of the field. Electrets, discovered in 1925, have found applications in electrostatic microphones.

The electret is a dielectric material with quasi-permanent charge; after its first theorization by Faraday, the term ‘electret’ was introduced by Oliver Heaviside (1892), in analogy to ‘magnet’, and the first …

An electret microphone is a type of condenser microphone that uses a permanently charged material to convert sound into an electrical signal. It’s the most common microphone design in the world, found …

Dec 2, 2024 · The ones in microphones are very small, but in the video after the break [Jay Bowles] from Plasma Channel makes a big electret and demonstrates it’s effects.

May 21, 2024 · An electret is a material that has a static electric field. There are many different types of electret, with the main ones...

Dec 10, 2023 · An electret microphone mainly consists of a diaphragm, a couple of electrodes and an in-built JFET. The diaphragm is made of thin Teflon material and is also termed as “electret” and hence …

Dayton Audio EMM-6 Precision Omnidirectional Electret Condenser Microphone for Room Acoustic Analyzers and Audio Measurement Systems, Calibration Data File with Response Graph Included

Nov 5, 2025 · The term “electret” was coined by Oliver Heaviside in 1885, drawing an analogy to how magnetic domains align in a permanent magnet. Electrets create an electric field in the surrounding …

May 28, 2025 · Electret microphones use a permanently charged electret material embedded in the diaphragm or backplate, eliminating the need for external polarization voltage. This makes electret …