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<a accesskey="3" href="page.php?w=RCA_Type_44&amp;p=2">3.Next</a>
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<p>The <b>RCA Type 44 microphone</b> is a bi-directional <a href="page.php?w=ribbon_microphone">ribbon microphone</a>, or pressure-gradient microphone, first introduced by the <a href="page.php?w=RCA_Corporation">RCA Corporation</a> in 1931.</p>

<p><big>History</big></p>
<p><a href="page.php?w=Image%3ARCA_44_of_CBS_20071104.png">thumb</a>Dr. <a href="page.php?w=Harry_F._Olson">Harry F. Olson</a> began working for <a href="page.php?w=RCA_Corporation">RCA Laboratories</a>, where he developed ribbon microphones, first with field coils and then with permanent</p><p>
<a accesskey="3" href="page.php?w=RCA_Type_44&amp;p=2">3.Next</a>
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