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Journal of the Society of Motion Picture Engineers ( Volume: 46, Issue: 3, March 1946)
[ACTIVE]

New Permanent Magnet Public Address Loudspeaker

Metadata

Publisher
SMPTE — White Plains, NY, USA
Doc Type
Journal Article
Content Type
Original Research
Abbreviated Title
J SMPE
Volume
46, No. 3, pp. 212–219
Abstract
This paper describes the permanent magnet type of Duplex loudspeaker and its use in theater public address systems. Its efficiency and frequency response is shown. Special types of baffles for the sides of the stage and above the screen are described. Because of its high efficiency and wide angle of distribution and extreme frequency range along with its small physical size, it provides a 2-way horn system with many advantages over those in present use.
Publication Date
1946-03-01
DOI
10.5594/J11845
ISSN
Print: 0097-5834
Link
https://doi.org/10.5594/J11845
Author(s)
James B. Lansing
Copyright
© 1946 Society of Motion Picture and Television Engineers, Inc.

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James B. Lansing; New Permanent Magnet Public Address Loudspeaker, Journal of the Society of Motion Picture Engineers ( Volume: 46, Issue: 3, March 1946); SMPTE, 1946. Available at https://doi.org/10.5594/J11845
Snippet:
James B. Lansing; New Permanent Magnet Public Address Loudspeaker, Journal of the Society of Motion Picture Engineers ( Volume: 46, Issue: 3, March 1946); SMPTE, 1946. Available at https://doi.org/10.5594/J11845

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Preview:
James B. Lansing; New Permanent Magnet Public Address Loudspeaker, Journal of the Society of Motion Picture Engineers ( Volume: 46, Issue: 3, March 1946); SMPTE, 1946. Available at https://doi.org/10.5594/J11845
Snippet:
<span class="citation">James B. Lansing; <cite>New Permanent Magnet Public Address Loudspeaker</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 46, Issue: 3, March 1946); SMPTE, 1946. Available at <a href="https://doi.org/10.5594/J11845" target="_blank" rel="noopener">https://doi.org/10.5594/J11845</a></span>

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Preview:
James B. Lansing; New Permanent Magnet Public Address Loudspeaker, Journal of the Society of Motion Picture Engineers ( Volume: 46, Issue: 3, March 1946); SMPTE, 1946
doi: 10.5594/J11845
url: https://doi.org/10.5594/J11845
Snippet:
<li>
James B. Lansing; <cite id="bib-10-5594-j11845">New Permanent Magnet Public Address Loudspeaker</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 46, Issue: 3, March 1946); SMPTE, 1946
<span class="doi">10.5594/J11845</span>
</li>

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