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Journal of the Society of Motion Picture Engineers ( Volume: 37, Issue: 10, October 1941)
[ACTIVE]

The Stereophonic Sound-Film System—General Theory

Metadata

Publisher
SMPTE
Doc Type
Journal Article
Article Type
research-article
Abstract
The general requirements are discussed for an ideal recording-reproducing system as determined by the characteristics of hearing of a typical group of persons listening in a typical concert hall or theater. Quantitative values are set down as ideal objectives. Although microphones, loud speakers, and amplifiers which had been developed for the stereophonic transmission system were available for meeting these objectives, no recording medium was known which would record the wide dynamic range of intensity levels which the objectives indicated was necessary. However, this wide intensity range objective was met by using a compandor in the electrical system. A general discussion is given of the reasons for choosing the particular compandor used, for using variable-area rather than variable-density on the recorded film, for using three instead of a greater or lesser number of channels. A general description of the stereophonic sound-film system is given, including the enhancement feature. This feature makes it possible to re-record from the original recording, at the same time making any desirable changes in the dynamic range or frequency response in each of the three channels.
Publication Date
1941-10-01
DOI
10.5594/J09956
Link
https://doi.org/10.5594/J09956
Author(s)
Harvey Fletcher
Source Data (JSON)

Full registry record with provenance metadata. Open directly: /api/doc/10.5594-J09956.json

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Harvey Fletcher; The Stereophonic Sound-Film System—General Theory, Journal of the Society of Motion Picture Engineers ( Volume: 37, Issue: 10, October 1941); SMPTE, 1941. Available at https://doi.org/10.5594/J09956
Snippet:
Harvey Fletcher; The Stereophonic Sound-Film System—General Theory, Journal of the Society of Motion Picture Engineers ( Volume: 37, Issue: 10, October 1941); SMPTE, 1941. Available at https://doi.org/10.5594/J09956

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Harvey Fletcher; The Stereophonic Sound-Film System—General Theory, Journal of the Society of Motion Picture Engineers ( Volume: 37, Issue: 10, October 1941); SMPTE, 1941. Available at https://doi.org/10.5594/J09956
Snippet:
<span class="citation">Harvey Fletcher; <cite>The Stereophonic Sound-Film System—General Theory</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 37, Issue: 10, October 1941); SMPTE, 1941. Available at <a href="https://doi.org/10.5594/J09956" target="_blank" rel="noopener">https://doi.org/10.5594/J09956</a></span>

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Preview:
Harvey Fletcher; The Stereophonic Sound-Film System—General Theory, Journal of the Society of Motion Picture Engineers ( Volume: 37, Issue: 10, October 1941); SMPTE, 1941
doi: 10.5594/J09956
url: https://doi.org/10.5594/J09956
Snippet:
<li>
Harvey Fletcher; <cite id="bib-10-5594-j09956">The Stereophonic Sound-Film System—General Theory</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 37, Issue: 10, October 1941); SMPTE, 1941
<span class="doi">10.5594/J09956</span>
</li>