electretn.adj.

Brit.

/ᵻˈlɛktrᵻt/, U.S.

/əˈlɛktrət/,

/iˈlɛktrət/

Origin: Formed within English, by compounding. Etymons: electric adj., electricity n., magnet n.

Etymology: < electr- (in electric adj., electricity n.) + -et (in magnet n.).

A. n.

A permanently polarized piece of dielectric material, the electric counterpart of the permanent magnet.

ΘΚΠ

the world > matter > physics > electromagnetic radiation > electricity > electric polarization > [noun] > polarized material

bar magnet1821

electret1885

1885 Electrician 7 Aug. 230/1 Solid insulating substances may be made electrets artificially, with a greater or less amount of permanency.

1903 S. J. Barnett Elem. Electromagn. Theory xi. 282 The quantity M = mL = T/H sin θ is called the magnetic moment of the magnet (analogous to the electric moment of an electret).

1936 Nature 18 July 130/1 An ‘electret’ is produced by solidifying certain types of wax, for example, carnauba wax, in a strong electric field... It is known that electrets can retain their original charge for a considerable period.

1968 New Scientist 4 July 30/1 The advantages of using electrets in telephony are economy and performance.

2000 J. Barnes Candle 82 Well, I could've just pulled the electrets out of your suit, opened the heat reservoirs, and left you to freeze.

B. adj.

attributive. Designating a kind of microphone in which an electret with a permanent electric polarization is used in place of the capacitor of an ordinary condenser microphone (which requires a voltage to maintain the charge on it).

ΚΠ

1943 U.S. Patent 2,327,136 1/2 The output of a Rochelle salt crystal or an electret microphone.

1976 Milton Keynes Express 9 July 18/2 (advt.) The Rexton ‘Mini-master’ hearing aid, with frontal electret microphone.

1992 Amer. Square Dance Jan. 71/1 Perma-mount electret goosenecks..feature a standard 5/8″–27 threaded flange for mounting on a mic stand.

2005 Electronic Musician (Nexis) 1 Dec. 86 These electret condenser cardioid mics are permanently fixed to the unit in a not-quite-coincident 90-degree XY configuration.

This entry has been updated (OED Third Edition, June 2008; most recently modified version published online March 2022).

单词	electret
释义	electretn.adj. Brit. /ᵻˈlɛktrᵻt/, U.S. /əˈlɛktrət/, /iˈlɛktrət/ Origin: Formed within English, by compounding. Etymons: electric adj., electricity n., magnet n. Etymology: < electr- (in electric adj., electricity n.) + -et (in magnet n.). A. n. A permanently polarized piece of dielectric material, the electric counterpart of the permanent magnet. ΘΚΠ the world > matter > physics > electromagnetic radiation > electricity > electric polarization > [noun] > polarized material bar magnet1821 electret1885 1885 Electrician 7 Aug. 230/1 Solid insulating substances may be made electrets artificially, with a greater or less amount of permanency. 1903 S. J. Barnett Elem. Electromagn. Theory xi. 282 The quantity M = mL = T/H sin θ is called the magnetic moment of the magnet (analogous to the electric moment of an electret). 1936 Nature 18 July 130/1 An ‘electret’ is produced by solidifying certain types of wax, for example, carnauba wax, in a strong electric field... It is known that electrets can retain their original charge for a considerable period. 1968 New Scientist 4 July 30/1 The advantages of using electrets in telephony are economy and performance. 2000 J. Barnes Candle 82 Well, I could've just pulled the electrets out of your suit, opened the heat reservoirs, and left you to freeze. B. adj. attributive. Designating a kind of microphone in which an electret with a permanent electric polarization is used in place of the capacitor of an ordinary condenser microphone (which requires a voltage to maintain the charge on it). ΚΠ 1943 U.S. Patent 2,327,136 1/2 The output of a Rochelle salt crystal or an electret microphone. 1976 Milton Keynes Express 9 July 18/2 (advt.) The Rexton ‘Mini-master’ hearing aid, with frontal electret microphone. 1992 Amer. Square Dance Jan. 71/1 Perma-mount electret goosenecks..feature a standard 5/8″–27 threaded flange for mounting on a mic stand. 2005 Electronic Musician (Nexis) 1 Dec. 86 These electret condenser cardioid mics are permanently fixed to the unit in a not-quite-coincident 90-degree XY configuration. This entry has been updated (OED Third Edition, June 2008; most recently modified version published online March 2022). < n.adj.1885
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