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

The Stereophonic Sound-Film System—Pre- and Post-Equalization of Compandor Systems

Metadata

Publisher
SMPTE
Doc Type
Journal Article
Article Type
research-article
Abstract
In order best to fit the volume range of the program material into the volume range available in sound-film, it is generally advantageous to pre-equalize the program material before recording, and to compensate for the equalization by means of a complementary post-equalizer on reproduction. The type and amount of pre-equalization depends upon the properties of hearing and on the characteristics of the program material and the film noise. This paper discusses the relations between these quantities for systems using compandors, where the film noise varies up and down in level as the compandor gains vary. Ideally, different types of preequalization are needed for different types of program material, and a compromise must be made if a single type is to be used. The considerations leading to the choice of the pre-equalization used in the stereophonic recording and reproducing system are discussed.
Publication Date
1941-10-01
DOI
10.5594/J09958
Link
https://doi.org/10.5594/J09958
Author(s)
John C. Steinberg
Source Data (JSON)

Full registry record with provenance metadata. Open directly: /api/doc/10.5594-J09958.json

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John C. Steinberg; The Stereophonic Sound-Film System—Pre- and Post-Equalization of Compandor Systems, Journal of the Society of Motion Picture Engineers ( Volume: 37, Issue: 10, October 1941); SMPTE, 1941. Available at https://doi.org/10.5594/J09958
Snippet:
John C. Steinberg; The Stereophonic Sound-Film System—Pre- and Post-Equalization of Compandor Systems, Journal of the Society of Motion Picture Engineers ( Volume: 37, Issue: 10, October 1941); SMPTE, 1941. Available at https://doi.org/10.5594/J09958

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John C. Steinberg; The Stereophonic Sound-Film System—Pre- and Post-Equalization of Compandor Systems, Journal of the Society of Motion Picture Engineers ( Volume: 37, Issue: 10, October 1941); SMPTE, 1941. Available at https://doi.org/10.5594/J09958
Snippet:
<span class="citation">John C. Steinberg; <cite>The Stereophonic Sound-Film System—Pre- and Post-Equalization of Compandor Systems</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/J09958" target="_blank" rel="noopener">https://doi.org/10.5594/J09958</a></span>

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Preview:
John C. Steinberg; The Stereophonic Sound-Film System—Pre- and Post-Equalization of Compandor Systems, Journal of the Society of Motion Picture Engineers ( Volume: 37, Issue: 10, October 1941); SMPTE, 1941
doi: 10.5594/J09958
url: https://doi.org/10.5594/J09958
Snippet:
<li>
John C. Steinberg; <cite id="bib-10-5594-j09958">The Stereophonic Sound-Film System—Pre- and Post-Equalization of Compandor Systems</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 37, Issue: 10, October 1941); SMPTE, 1941
<span class="doi">10.5594/J09958</span>
</li>