<?xml version="1.0" encoding='utf-8'?>
<!DOCTYPE wml PUBLIC "-//WAPFORUM//DTD WML 1.1//EN" "http://www.wapforum.org/DTD/wml_1.1.xml">
<wml>
<card id="card1" title="Electret microphone - Page 3 - Wikipedia">
<p>
<a accesskey="1" href="page.php?w=electret_microphone&amp;p=2">1.Previous</a><br />
<a accesskey="3" href="page.php?w=electret_microphone&amp;p=4">3.Next</a>
</p>
<p>is typically incorporated to boost the <a href="page.php?w=Audio_signal">audio</a> voltage <a href="page.php?w=Analog_signal">signal</a>.</p>

<p><big> Electret material </big></p>
<p>An electret is a stable <a href="page.php?w=dielectric">dielectric</a> material with a permanently-embedded electric dipole that persists for hundreds of years due to its high <a href="page.php?w=Electrical_resistance">resistance</a> and chemical stability. The name comes from electrostatic and magnet; drawing analogy to the formation of a <a href="page.php?w=magnet">magnet</a></p><p>
<a accesskey="1" href="page.php?w=electret_microphone&amp;p=2">1.Previous</a><br />
<a accesskey="3" href="page.php?w=electret_microphone&amp;p=4">3.Next</a>
</p>

<do type="prev" label="Search">
        <go href="search.wml"/>
</do>

</card>
</wml>
