Journal of the Society of Motion Picture Engineers ( Volume: 18, Issue: 5, May 1932)
[ACTIVE]
Recent Developments in Theater Loud Speakers of the Directional Baffle Type
Metadata
- Publisher
- SMPTE — White Plains, NY, USA
- Doc Type
- Journal Article
- Content Type
- Original Research
- Abbreviated Title
- J SMPE
- Volume
- 18, No. 5, pp. 571–583
- Abstract
- This paper describes a group of directional baffle loud speakers that are designed to combine high efficiency of transformation of electrical into acoustical energy, with directional characteristics that are particularly adapted to large-scale reproduction of sound with good fidelity. Three types of directional baffle loud speakers have been designed, each satisfying a certain set of requirements. The 60-inch directional baffle covers an extremely large frequency range and is designed for theaters with good acoustic characteristics. The 37-inch directional baffle is designed to compensate for the acoustics of theaters with high reverberation characteristics. The 25-inch directional baffle is designed for theaters in which the space behind the screen is extremely limited. Response measurements show that the output of these loud speakers is uniform over a wide frequency band. The uniform directional characteristics of these loud speakers eliminate the possibility of frequency discrimination for points removed from the axis. These loud speakers, due to the high efficiency and rugged construction, are capable of delivering large acoustic outputs without distortion.
- Publication Date
- 1932-05-01
- DOI
10.5594/J05522- ISSN
- Print:
0097-5834 - Link
- https://doi.org/10.5594/J05522
- Author(s)
- Harry F. OlsonResearch Division, RCA Photophone, Inc., Camden, N. J.
- Copyright
- © 1932 Society of Motion Picture and Television Engineers, Inc.
Bibliographic Reference(s)
- 1 WeBster A. G. : “Acoustical Impedance and the Theory of Horns and the Phonograph,” Jour. Natl. Academy of Sciences ( 1919 ), p. 275 . EXTERNAL
- 2 Hanna C. R. Slepian J. : “Function and Design of Horns for Loud Speakers,” Jour. A. I. E. E. ( 1924 ), p. 384 . EXTERNAL
- 3 Webster A.G. : Loc. cit. . EXTERNAL
- 4 Photophone Loud Speaker , P. L. 35, P. L. 43, and P. L. 49. EXTERNAL
- 5 Olson H. F. : “A New High Efficiency Theater Loud Speaker of the Directional Baffle Type,” J. Acoustical Soc. of Amer. , Iii ( 1931 ), p. 485 . EXTERNAL
- 6 Malter L. : “Loud Speakers and Theater Sound Reproduction,” J. Soc. Mot. Pict. Eng. , Xiv (June, 1930 ), No. 6 , p. 611 . EXTERNAL
- 7 Kennelly A. E. Pierce G. W. , “The Impedance of Telephone Receivers as Affected by the Motion of Their Diaphragms,” Proc. Amer. Acad. Arts and Sciences , 48 ( 1912 ), No. 6 , p. 111 . EXTERNAL
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Harry F. Olson; Recent Developments in Theater Loud Speakers of the Directional Baffle Type, Journal of the Society of Motion Picture Engineers ( Volume: 18, Issue: 5, May 1932); SMPTE, 1932. Available at https://doi.org/10.5594/J05522
Snippet:
Harry F. Olson; Recent Developments in Theater Loud Speakers of the Directional Baffle Type, Journal of the Society of Motion Picture Engineers ( Volume: 18, Issue: 5, May 1932); SMPTE, 1932. Available at https://doi.org/10.5594/J05522
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Harry F. Olson; Recent Developments in Theater Loud Speakers of the Directional Baffle Type, Journal of the Society of Motion Picture Engineers ( Volume: 18, Issue: 5, May 1932); SMPTE, 1932. Available at https://doi.org/10.5594/J05522
Snippet:
<span class="citation">Harry F. Olson; <cite>Recent Developments in Theater Loud Speakers of the Directional Baffle Type</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 18, Issue: 5, May 1932); SMPTE, 1932. Available at <a href="https://doi.org/10.5594/J05522" target="_blank" rel="noopener">https://doi.org/10.5594/J05522</a></span>
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Harry F. Olson; Recent Developments in Theater Loud Speakers of the Directional Baffle Type, Journal of the Society of Motion Picture Engineers ( Volume: 18, Issue: 5, May 1932); SMPTE, 1932
doi: 10.5594/J05522
url: https://doi.org/10.5594/J05522
doi: 10.5594/J05522
url: https://doi.org/10.5594/J05522
Snippet:
<li> Harry F. Olson; <cite id="bib-10-5594-j05522">Recent Developments in Theater Loud Speakers of the Directional Baffle Type</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 18, Issue: 5, May 1932); SMPTE, 1932 <span class="doi">10.5594/J05522</span> </li>