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SMPTE Motion Imaging Journal, July/August 2006
[ACTIVE]

The X-Curve, its Origins and History

Metadata

Publisher
SMPTE
Doc Type
Conference Paper
Content Type
Original Research
Abstract
This paper traces the beginnings of the X-Curve in work carried out in the early 1970s, and follows the various developments since that time. This electroacoustic characteristic is now employed in most theatres throughout the world. The “X” stood for “experimental,” an epithet that now seems inappropriate for something that's been a national and international standard for 30 years!
Publication Date
2005-11-01
DOI
10.5594/M00395
Link
https://doi.org/10.5594/M00395
Author(s)
Ioan Allen

Bibliographic Reference(s)

  • The Production of Wide-Range, Low-Distortion Optical Soundtracks Utilizing the Dolby Noise Reduction System [Active]
  • Standardized Sound Reproduction in Cinemas and Control Rooms [Active]
  • A Report on Listening Characteristics in 25 Danish Cinemas [Active]
  • The Evaluation and Standardization of the Loudspeaker-Acoustics Link in Motion-Picture Theaters [Active]
  • Are Movies Too Loud? [Active]
  • 1. “Standard Electrical Characteristics for Theatre Sound Systems.” Technical Bulletin, Motion Picture Research Council, Inc., Apr. 1948 . EXTERNAL
  • 10. Queen Daniel , “Temporal Considerations Differentiating Sound in Review Rooms vs. Theatres.” SMPTE J. 86 : 148 , Mar. 1977 . EXTERNAL
  • 11. Vlahos Petro , “Comment on DIS 2969—Electro-Acoustic Response of Motion Picture Control Rooms.” Document submitted to ISO TC36 by US Correspondent, Aug. 1973 . EXTERNAL
  • 12. Allen Ioan , “Surrounds and Surround Loudspeaker Distribution.” ITEA Seminar Series , Dec. 1999 . EXTERNAL
  • 13. “Relative and Absolute Sound Pressure Levels for Motion-Picture Multichannel Sound Systems—Applicable for Analogue Photographic Film Audio, Digital Photographic Film Audio and D-Cinema.” SMPTE Recommended Practice RP200–2002. EXTERNAL
  • 14. Allen Ioan , “Are Movies too Loud?” SMPTE J. 107 : 1 , Jan. 1998 . EXTERNAL
  • 15. Watson C.S. Gengle R.W. , “Signal Duration and Signal Frequency in Relation to Auditory Sensitivity.” Journal of the Acoustical Society of America 46 : 989 , No. 4 Pt. 2, 1969 . EXTERNAL
  • 2. Durst F. Shortt E. J. , “Characteristics of Film Reproducer Systems.” JSMPE , Feb. 1939 . EXTERNAL
  • 7. Olson Harry F. , “Frequency Range Preference for Speech and Music.” Journal of the Acoustical Society of America 19 : 549 , July 1949 . EXTERNAL
  • 8. Davis Don Palmquist Don , “Equalizing the Sound System to Match the Room.” Electronics World 34 , Jan. 1970 . EXTERNAL
  • 9. Schulein Robert B. , “In Situ Measurement and Equalization of Sound Reproduction Systems.” Journal of the Audio Engineering Society 23 : 178 , Apr. 1975 . EXTERNAL
  • “Standard Electrical Characteristics for Theatre Sound Systems.” EXTERNAL
  • Temporal Considerations Differentiating Sound in Review Rooms vs. Theatres. EXTERNAL
  • “Comment on DIS 2969—Electro-Acoustic Response of Motion Picture Control Rooms.” Document submitted to ISO TC36 by US Correspondent EXTERNAL
  • Surrounds and Surround Loudspeaker Distribution. EXTERNAL
  • SMPTE Recommended Practice RP200–2002 — Relative and Absolute Sound Pressure Levels for Motion-Picture Multichannel Sound Systems—Applicable for Analogue Photographic Film Audio, Digital Photographic Film Audio and D-Cinema. EXTERNAL
  • Signal Duration and Signal Frequency in Relation to Auditory Sensitivity. EXTERNAL
  • Characteristics of Film Reproducer Systems. EXTERNAL
  • Standardized Sound Reproduction in Cinemas and Control Rooms. EXTERNAL
  • A Report on Listening Characteristics in 25 Danish Cinemas. EXTERNAL
  • The Evaluation and Standardization of the Loudspeaker-Acoustics Link in Motion-Picture Theatres. EXTERNAL
  • The Production of Wide-Range, Low-Distortion Optical Soundtracks Utilizing the Dolby Noise Reduction System. EXTERNAL
  • Frequency Range Preference for Speech and Music. EXTERNAL
  • Equalizing the Sound System to Match the Room. EXTERNAL
  • In Situ Measurement and Equalization of Sound Reproduction Systems. EXTERNAL
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Ioan Allen; The X-Curve, its Origins and History, SMPTE Motion Imaging Journal, July/August 2006; SMPTE, 2005. Available at https://doi.org/10.5594/M00395
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Ioan Allen; The X-Curve, its Origins and History, SMPTE Motion Imaging Journal, July/August 2006; SMPTE, 2005. Available at https://doi.org/10.5594/M00395

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Ioan Allen; The X-Curve, its Origins and History, SMPTE Motion Imaging Journal, July/August 2006; SMPTE, 2005. Available at https://doi.org/10.5594/M00395
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<span class="citation">Ioan Allen; <cite>The X-Curve, its Origins and History</cite>, SMPTE Motion Imaging Journal, July/August 2006; SMPTE, 2005. Available at <a href="https://doi.org/10.5594/M00395" target="_blank" rel="noopener">https://doi.org/10.5594/M00395</a></span>

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Ioan Allen; The X-Curve, its Origins and History, SMPTE Motion Imaging Journal, July/August 2006; SMPTE, 2005
doi: 10.5594/M00395
url: https://doi.org/10.5594/M00395
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Ioan Allen; <cite id="bib-10-5594-m00395">The X-Curve, its Origins and History</cite>, SMPTE Motion Imaging Journal, July/August 2006; SMPTE, 2005
<span class="doi">10.5594/M00395</span>
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