SMPTE Motion Imaging Journal ( Volume: 121, Issue: 8, 2012)
[ACTIVE]
Further Investigations into the Interactions between Cinema Loudspeakers and Screens
Metadata
- Publisher
- SMPTE — White Plains, NY, USA
- Doc Type
- Journal Article
- Content Type
- Original Research
- Abbreviated Title
- SMPTE Mot. Imag. J
- Volume
- 121, No. 8, pp. 46–62
- Abstract
- Modern-day data-acquisition techniques allow the gathering of high-resolution polar data to assess the detailed performance of loudspeakers. While these techniques are now common in engineering laboratories, they can also be used for acoustic investigation into the in situ performance of loudspeakers. This paper uses modern high-resolution data-acquisition techniques and analysis tools to investigate the complexity of the interaction between a loudspeaker and the screen in a cinema presentation environment. A discussion is presented that explores the effects of three types of screen materials on loudspeaker frequency responses and radiation patterns. These screen effects are explored using a range of loudspeaker-screen distances found in typical cinemas. The impact of the screen on patron listening experience is examined, particularly in relation to the standards for system response set out in SMPTE Timed Text 202:2010.
- Publication Date
- 2012-11-01
- DOI
10.5594/j18247XY- ISSN
- Print:
1545-0279 - Link
- https://doi.org/10.5594/j18247XY
- Author(s)
- Brian Long
bio
Brian Long has more than 15 years in professional audio and a diverse and extensive knowledge regarding the design and implementation of sound reinforcement and playback systems for all types of scenarios ranging from simple single speaker events to massive show spectaculars and multichannel media presentation environments. Long holds a Master of Fine Arts from the University of Southern California's School of Cinematic Arts, where he specialized in post-production audio and worked on advanced multichannel audio concepts. He is currently a member of the engineering team at Skywalker Sound.Roger Schwenkebio
Roger Schwenke, PhD., is a senior scientist and has been contributing his expertise in acoustic measurement and prediction at Meyer Sound Laboratories for over ten years. Schwenke's expertise in acoustics has been applied towards making acoustical measurements and recommendations, including the design and tuning Constellation systems, at world class venues around the world. He has participated in the development of a number of the company's innovative products, including MAPP Online, SIM 3, Constellation Electroacoustic Architecture, the M1D UltraCompact Curvilinear Array Loudspeaker, and LD-3 Compensating Line Driver. Schwenke received a Doctorate in Acoustics from Penn State University in December of 2000; his thesis work in advanced detection and estimation methods was sponsored by the Applied Research Laboratory. He is a member of the Acoustical Society of America.Peter Soperbio
Peter Soper has been a member of Meyer Sound's Technical staff since 1986. He holds several design and technical patents for loudspeaker technology, and is a member of SMPTE and the Audio Engineering Society.Glenn Leembruggenbio
Glenn Leembruggen is a principal of the consulting engineering firms of Acoustic Directions and ICE Design in Australia and is also an Associate of Sydney University. Playing saxophone in a Chicago style electric blues band, Leembruggen is quite passionate about the left and right brain aspects of sound (physics and the aural experience) and his work designing rooms and sound systems to deliver extremely high quality speech and music. His current work is with courts, parliaments, transport terminals, road tunnels and cathedrals. Among Leembruggen's research interests are the differences that exist between subjective and measured speech intelligibility, cinema sound and the measurement and prediction of acoustic absorption. He is member of the Audio Engineering Society (AES), ASA, IOA, and SMPTE and is part of the Maintenance Team for the STI standard IEC 60268-16. - Copyright
- © 2012 Society of Motion Picture and Television Engineers, Inc.
Bibliographic Reference(s)
- The Academy's New State-of-the-Art Loudspeaker System [Active]
- 2. Allen J. Hunter J. Geist K. Delgado R. , “Employing Specific Loudspeaker Designs Which Can Substantially Reduce Motion Picture Screen Interference and Losses,” presented at the 132nd SMPTE Technical Conference, New York, NY, Oct. 1990 . EXTERNAL
- 3. Baird J. Meyer P. , “The Analysis, Interaction, and Measurement of Loudspeaker Far-Field Polar Patterns,” presented at the 106th Audio Engineering Society Convention, Munich, preprint 4949, May 1999 . EXTERNAL
- 4. Meyer J. Meyer P. Baird J. , “Far-Field Loudspeaker Interaction: Accuracy in Theory and Practice,” presented at the 110th Audio Engineering Society Convention, Amsterdam, preprint 5309, May 2001 . EXTERNAL
- 5. Seidel F. Staffeldt H. , “Frequency and Angular Resolution for Measuring, Presenting and Predicting Loudspeaker Polar Data,” J. Audio Eng. Soc. , 44 ( 7/8 ), July/Aug. 1996 . Barron M. , Auditorium Acoustics , Spon Press , 2003 . EXTERNAL
- 6. Meyer Sound Laboratories, MAPP Online Pro Cinema , http://www.meyersound.com/products/mapponline/cinema/register/ . EXTERNAL
- 7. Stevens R. Vanderkooy J. , “A Novel Single-Microphone Method of Measuring Acoustical Impedance in a Tube,” presented at the 115th AES Convention, paper 5901, 2000 . EXTERNAL
- 8. Leembruggen G. Gilfillan D. , “Comparison of Measured and Predicted Sound Absorption Properties of Polyester Fibre Insulation Using an Unusual Plane Wave Tube,” Proc. IOA ‘10 , presented at Reproduced Sound Conference, UK 2010 . EXTERNAL
- 9. Colam S. Leembruggen G. , “Analysis and Design of Acoustic Absorbers and Low Frequency Transmission Loss,” Proc. IOA ‘03 , presented at Reproduced Sound Conference, UK 2003 . EXTERNAL
- 10. Guy R. , “A Preliminary Study Model for the Absorption or Transmission of Sound in Multi-Layer Systems,” Noise Contr. Eng. J. , 33 ( 3 ), Nov. 1989 . EXTERNAL
- 11. Cox T. D'Antonio P. , Acoustic Absorbers and Diffusers: Theory, Design, and Application , Spon Press : New York, NY , 2004 . EXTERNAL
- 12. Lee J. Swenson G. , “Compact Sound Absorbers for Low Frequencies,” Noise Contr. Eng. J. , 38 ( 3 ): 109 – 117 , 1992 . EXTERNAL
- 13. Maa D. Y. , “Potential of Microperforated Panel Absorber,” J. Acoust. Soc. Am. , 104 ( 5 ): 2861 – 2866 , Nov. 1998 . EXTERNAL
- 14. Chu W. , “Extension of the Two-Microphone Transfer Function Method for Impedance Tube Measurements,” J. Acoust. Soc. Am. , 80 : 1 , 1986 . EXTERNAL
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Brian Long, Roger Schwenke, Peter Soper, and Glenn Leembruggen; Further Investigations into the Interactions between Cinema Loudspeakers and Screens, SMPTE Motion Imaging Journal ( Volume: 121, Issue: 8, 2012); SMPTE, 2012. Available at https://doi.org/10.5594/j18247XY
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Brian Long, Roger Schwenke, Peter Soper, and Glenn Leembruggen; Further Investigations into the Interactions between Cinema Loudspeakers and Screens, SMPTE Motion Imaging Journal ( Volume: 121, Issue: 8, 2012); SMPTE, 2012. Available at https://doi.org/10.5594/j18247XY
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Brian Long, Roger Schwenke, Peter Soper, and Glenn Leembruggen; Further Investigations into the Interactions between Cinema Loudspeakers and Screens, SMPTE Motion Imaging Journal ( Volume: 121, Issue: 8, 2012); SMPTE, 2012. Available at https://doi.org/10.5594/j18247XY
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<span class="citation">Brian Long, Roger Schwenke, Peter Soper, and Glenn Leembruggen; <cite>Further Investigations into the Interactions between Cinema Loudspeakers and Screens</cite>, SMPTE Motion Imaging Journal ( Volume: 121, Issue: 8, 2012); SMPTE, 2012. Available at <a href="https://doi.org/10.5594/j18247XY" target="_blank" rel="noopener">https://doi.org/10.5594/j18247XY</a></span>
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Brian Long, Roger Schwenke, Peter Soper, and Glenn Leembruggen; Further Investigations into the Interactions between Cinema Loudspeakers and Screens, SMPTE Motion Imaging Journal ( Volume: 121, Issue: 8, 2012); SMPTE, 2012
doi: 10.5594/j18247XY
url: https://doi.org/10.5594/j18247XY
doi: 10.5594/j18247XY
url: https://doi.org/10.5594/j18247XY
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<li> Brian Long, Roger Schwenke, Peter Soper, and Glenn Leembruggen; <cite id="bib-10-5594-j18247xy">Further Investigations into the Interactions between Cinema Loudspeakers and Screens</cite>, SMPTE Motion Imaging Journal ( Volume: 121, Issue: 8, 2012); SMPTE, 2012 <span class="doi">10.5594/j18247XY</span> </li>