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electret

   Also found in: Dictionary/thesaurus, Encyclopedia, Wikipedia 0.01 sec.
electret
[ilek′trət]
an insulator carrying a permanent charge similar to a permanent magnet.


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Materials of electret processed and that of not processed are used in meltblown nonwovens and they are broken down between processed (61%) and non processed (39%).
Three types of air cleaners work using electrical attraction: electrostatic precipitating cleaners, electret filters, and negative ion generators.
Usually camcorders have a built in stereo electret type microphone which can be unplugged from its socket or there are external microphone sockets and some means of switching between them and the built in microphones, also an A/V socket is usually available for plugging in an external audio mixer.
 
 
 
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