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Journal of the Society of Motion Picture Engineers ( Volume: 18, Issue: 4, April 1932)
[ACTIVE]

The Acoustics of Large Auditoriums

Metadata

Publisher
SMPTE
Doc Type
Journal Article
Article Type
research-article
Abstract
Extremely large auditoriums present acoustical difficulties which do not readily yield to the customary methods of analysis and correction. This is illustrated by measurements of the time of reverberation, made in the Madison Square Garden, New York, N. Y., which revealed a considerable discrepancy between theoretical expectations and the times actually measured throughout the frequency range. At 500 cycles, for example, analysis of the auditorium indicated a decay period of 35.5 seconds, whereas the time actually measured by the spark chronograph reverberation meter was only 7.6 seconds. On the basis of the measured time, 47,000 square feet of one-inch rock wool were installed. This material was distributed in a manner calculated to suppress undesirable discrete reflections as well as to reduce the general reverberation time. The result was a reduction in the measured time to 3.5 seconds and the complete elimination of acoustic difficulties. Present reverberation formulas do not possess sufficient generality to justify application to enclosures which are extremely atypical in size or shape. Until such formulas are developed, reliance must be placed on actual measurements.
Publication Date
1932-04-01
DOI
10.5594/J01344
Link
https://doi.org/10.5594/J01344
Author(s)
S. K. Wolf
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S. K. Wolf; The Acoustics of Large Auditoriums, Journal of the Society of Motion Picture Engineers ( Volume: 18, Issue: 4, April 1932); SMPTE, 1932. Available at https://doi.org/10.5594/J01344
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S. K. Wolf; The Acoustics of Large Auditoriums, Journal of the Society of Motion Picture Engineers ( Volume: 18, Issue: 4, April 1932); SMPTE, 1932. Available at https://doi.org/10.5594/J01344

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S. K. Wolf; The Acoustics of Large Auditoriums, Journal of the Society of Motion Picture Engineers ( Volume: 18, Issue: 4, April 1932); SMPTE, 1932. Available at https://doi.org/10.5594/J01344
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<span class="citation">S. K. Wolf; <cite>The Acoustics of Large Auditoriums</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 18, Issue: 4, April 1932); SMPTE, 1932. Available at <a href="https://doi.org/10.5594/J01344" target="_blank" rel="noopener">https://doi.org/10.5594/J01344</a></span>

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Preview:
S. K. Wolf; The Acoustics of Large Auditoriums, Journal of the Society of Motion Picture Engineers ( Volume: 18, Issue: 4, April 1932); SMPTE, 1932
doi: 10.5594/J01344
url: https://doi.org/10.5594/J01344
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<li>
S. K. Wolf; <cite id="bib-10-5594-j01344">The Acoustics of Large Auditoriums</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 18, Issue: 4, April 1932); SMPTE, 1932
<span class="doi">10.5594/J01344</span>
</li>