electret


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e·lec·tret

 (ĭ-lĕk′trĭt)
n.
A solid dielectric that exhibits persistent dielectric polarization.

electret

(ɪˈlɛktrət)
n
(General Physics) a permanently polarized dielectric material; its electric field is similar to the magnetic field of a permanent magnet
[C20: from electr(icity + magn)et]
References in periodicals archive ?
the noise-canceling electret microphone assures crystal clear voice communications.
The study included a commonly used F7-class glass-fiber filter, HEPA-class filters, an electret filter and an electrostatic precipitator.
In addition to the microcontroller, the platform contained a circuit board that received input from an electret microphone (Model WM-63GNT, Panasonic Corp.
KCP's filter media uses an underlying mechanical structure, coupled with electret treatment, to efficiently capture particles while keeping airflow resistance low for a longer period of time.
The boom for the electret microphone can be rotated 360 degrees and placed on either side of the headset.
Using a pair of electret transducers (6 mm diameter, 2 mm thick) the phase delay between them can be used to determine the propagation speed of the pressure disturbance.
activated charcoal, alpha-track detectors, charcoal liquid scintillation, continuous radon monitors, electret ion chamber), test dates, and radon concentration (Bq/[m.
The sample so obtained is thus a stable electret, that is, a sample presenting a given amount of permanent orientational polarization [step (5)].
ClickPress, Sun May 17 2015] Microphone Market by Type (MEMS (Analog and Digital), Electret, Other), by Application (automotive, commercial security & surveillance, consumer electronics, industrial, medical, and sensing), & by Geography - Analysis & Forecast to 2014 - 2020
The authors of this work developed a method for manufacturing the particles of polyvinylidene difluoride (PVDF) (Liiv, 2013), which is an electret material with an extremely high residual electric field.
The unit sensor is an electret capacitor without metallic cover to allow direct contact between the diaphragm and the silicone.