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Journal of the Society of Motion Picture Engineers ( Volume: 33, Issue: 9, September 1939)
[ACTIVE]

A Cardioid Directional Microphone

Metadata

Publisher
SMPTE
Doc Type
Journal Article
Article Type
research-article
Abstract
A microphone is described which has uniform directivity over a wide frequency range. This is made possible by placing in a single instrument n dynamic type pressure microphone element and a ribbon type “velocity” element, and electrically equalizing the outputs before combination. The resultant directional pattern is a heart-shaped curve or cardioid, giving a fairly wide pick-up zone in front and a substantial dead zone at the back of the instrument. Because of the unusually rugged ribbon employed, the new microphone is much less susceptible to wind noise than ordinary ribbon types. Housed in an aluminum case, the microphone weighs only 3 1/4 lbs. High output level, low impedance, and high quality, together with the excellent directivity, promise to make the cardioid microphone an important tool for the motion picture sound engineer.
Publication Date
1939-09-01
DOI
10.5594/J11953
Link
https://doi.org/10.5594/J11953
Author(s)
R. N. Marshall, W. R. Harry
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R. N. Marshall and W. R. Harry; A Cardioid Directional Microphone, Journal of the Society of Motion Picture Engineers ( Volume: 33, Issue: 9, September 1939); SMPTE, 1939. Available at https://doi.org/10.5594/J11953
Snippet:
R. N. Marshall and W. R. Harry; A Cardioid Directional Microphone, Journal of the Society of Motion Picture Engineers ( Volume: 33, Issue: 9, September 1939); SMPTE, 1939. Available at https://doi.org/10.5594/J11953

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R. N. Marshall and W. R. Harry; A Cardioid Directional Microphone, Journal of the Society of Motion Picture Engineers ( Volume: 33, Issue: 9, September 1939); SMPTE, 1939. Available at https://doi.org/10.5594/J11953
Snippet:
<span class="citation">R. N. Marshall and W. R. Harry; <cite>A Cardioid Directional Microphone</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 33, Issue: 9, September 1939); SMPTE, 1939. Available at <a href="https://doi.org/10.5594/J11953" target="_blank" rel="noopener">https://doi.org/10.5594/J11953</a></span>

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Preview:
R. N. Marshall and W. R. Harry; A Cardioid Directional Microphone, Journal of the Society of Motion Picture Engineers ( Volume: 33, Issue: 9, September 1939); SMPTE, 1939
doi: 10.5594/J11953
url: https://doi.org/10.5594/J11953
Snippet:
<li>
R. N. Marshall and W. R. Harry; <cite id="bib-10-5594-j11953">A Cardioid Directional Microphone</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 33, Issue: 9, September 1939); SMPTE, 1939
<span class="doi">10.5594/J11953</span>
</li>