Journal of the Society of Motion Picture Engineers ( Volume: 21, Issue: 4, October 1933)

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Wave Form Analysis of Variable Width Sound Records

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Publisher: SMPTE — White Plains, NY, USA
Doc Type: Journal Article
Content Type: Original Research
Abbreviated Title: J SMPE
Volume: 21, No. 4, pp. 323–336
Abstract: The results of a study of the relation between sensitometric conditions and the harmonic content introduced in the photographic process are described. Sinusoidal wave-forms of very low initial harmonic content were recorded, varying the negative exposure, negative development time, and positive exposure so as to cover a range of negative densities, negative gammas, and print densities. Sets of such records were made at several levels of modulation and several frequencies from 100 to 4000 cycles per second. — The records were analyzed on a recording microdensitometer which automatically recorded the transmission of the sound track. These traces, after being enlarged to the appropriate size in order to determine the harmonic content, were analyzed with a harmonic analyzer. The results show that sensitometric conditions for good quality are much more critical at the higher frequencies and that in general the harmonic content does not increase at those frequencies.
Publication Date: 1933-10-01
DOI: 10.5594/J12979
ISSN: Print: 0097-5834
Link: https://doi.org/10.5594/J12979
Author(s): O. SandvikEastman Kodak Co., Rochester, N. Y.
V. C. HallEastman Kodak Co., Rochester, N. Y.
J. G. StreiffertEastman Kodak Co., Rochester, N. Y.
Copyright: © 1933 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

Wave Form Analysis of Variable Density Sound Recording [Active]
The Rendering of Tone Values in the Photographic Recording of Sound [Active]
The Effect of Exposure and Development on the Quality of Variable Width Photographic Sound Recording [Active]
High Frequency Response from Variable Width Records as Affected by Exposure and Development [Active]
The Photographic Treatment of Variable Area Sound Films [Active]
The Aperture Effect [Active]
1. Hardy A. C. : “The Rendering of Tone Values in the Photographic Recording of Sound,” Trans. Soc. Mot. Pict. Eng. , XI ( 1927 ), No. 31 , p. 475 . EXTERNAL
2. Cook E. D. : “The Aperture Effect,” J. Soc. Mot. Pict. Eng. , XIV (June, 1930 ), No. 6 , p. 650 . EXTERNAL
3. Foster D. : “The Effect of Exposure and Development on the Quality of Variable Width Sound Recording,” J. Soc. Mot. Pict. Eng. , XVII (November, 1931 ), No. 6 , p. 749 . EXTERNAL
4. Maurer J. A. : “The Photographic Treatment of Variable Area Sound Films,” J. Soc. Mot. Pict. Eng. , XIV (June, 1930 ), No. 6 , p. 636 . EXTERNAL
5. Dimmick G. L. : “High Frequency Response from Variable Width Records as Affected by Exposure and Development,” J. Soc. Mot. Pict. Eng. , XVII (November, 1931 ), No. 6 , p. 766 . EXTERNAL
6. Sandvik O. Hall V. C. : “Wave-Form Analysis of Variable Density Sound Recording,” J. Soc. Mot. Pict. Eng. , XIX (October, 1932 ), No. 4 , p. 346 . EXTERNAL

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O. Sandvik, V. C. Hall, and J. G. Streiffert; Wave Form Analysis of Variable Width Sound Records, Journal of the Society of Motion Picture Engineers ( Volume: 21, Issue: 4, October 1933); SMPTE, 1933. Available at https://doi.org/10.5594/J12979

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O. Sandvik, V. C. Hall, and J. G. Streiffert; Wave Form Analysis of Variable Width Sound Records, Journal of the Society of Motion Picture Engineers ( Volume: 21, Issue: 4, October 1933); SMPTE, 1933. Available at https://doi.org/10.5594/J12979

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<span class="citation">O. Sandvik, V. C. Hall, and J. G. Streiffert; <cite>Wave Form Analysis of Variable Width Sound Records</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 21, Issue: 4, October 1933); SMPTE, 1933. Available at <a href="https://doi.org/10.5594/J12979" target="_blank" rel="noopener">https://doi.org/10.5594/J12979</a></span>

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O. Sandvik, V. C. Hall, and J. G. Streiffert; <cite id="bib-10-5594-j12979">Wave Form Analysis of Variable Width Sound Records</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 21, Issue: 4, October 1933); SMPTE, 1933
<span class="doi">10.5594/J12979</span>
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Referenced By

Optical Reduction Sound Printing [Active]
Some Photographic Aspects of Sound Recording [Active]
Some Characteristics of 16-mm. Sound by Optical Reduction and Re-Recording [Active]
History of Sound Motion Pictures [Active]