Journal of the Society of Motion Picture Engineers ( Volume: 33, Issue: 10, October 1939)

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Controlled Sound Reflection in Review Rooms, Theaters, ETC.

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Publisher: SMPTE
Doc Type: Journal Article
Article Type: research-article
Abstract: This paper avoids technicalities and formulas, reaching back to elementary acoustics which are often side-tracked. Controlled reflection plays the leading role, with the minor parts delegated to sound diffusion and uniform energy distribution. Although much can be mathematically proved, the only satisfying conditions are the apparent ones, which are judged and gauged by the normal human ears. Audio effects due to the physical characteristics of both sound absorbents and building materials are explained and their proper locations emphasized. Although a room can have the desired optimal reverberation time over the entire frequency response characteristic, it can still be unsuitable for the rendition of speech and music that is clear and distinct; the shape, size, and contours of the six surfaces in a room, plus the incidental equipment and purpose, are the deciding factors on how much and where the rejecting and absorbing materials should be placed.
Publication Date: 1939-10-01
DOI: 10.5594/J11943
Link: https://doi.org/10.5594/J11943
Author(s): C. M. Mugler

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C. M. Mugler; Controlled Sound Reflection in Review Rooms, Theaters, ETC., Journal of the Society of Motion Picture Engineers ( Volume: 33, Issue: 10, October 1939); SMPTE, 1939. Available at https://doi.org/10.5594/J11943

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C. M. Mugler; Controlled Sound Reflection in Review Rooms, Theaters, ETC., Journal of the Society of Motion Picture Engineers ( Volume: 33, Issue: 10, October 1939); SMPTE, 1939. Available at https://doi.org/10.5594/J11943

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<span class="citation">C. M. Mugler; <cite>Controlled Sound Reflection in Review Rooms, Theaters, ETC.</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 33, Issue: 10, October 1939); SMPTE, 1939. Available at <a href="https://doi.org/10.5594/J11943" target="_blank" rel="noopener">https://doi.org/10.5594/J11943</a></span>

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<li>
C. M. Mugler; <cite id="bib-10-5594-j11943">Controlled Sound Reflection in Review Rooms, Theaters, ETC.</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 33, Issue: 10, October 1939); SMPTE, 1939
<span class="doi">10.5594/J11943</span>
</li>