Some Features of Physical Structure of Acoustic Fields of Stereophonic Systems

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Publisher: SMPTE — White Plains, NY, USA
Doc Type: Journal Article
Content Type: Original Research
Volume: 76, No. 2, pp. 105–110
Abstract: The definition of an ideal stereophonic system is given and a theoretical example of such a system is presented; this system restores exactly, at all the points of the secondary field, the physical structure of the primary field according to all the acoustic parameters. A multichannel system is usually considered as a practical compromise. The definition of a real stereophonic system is given; such a systems's basic requirement is the reconstruction of localization effect, which is best obtained in the primary free field. Since the sound oscillations are longitudinal, the movements of air particles are rectilinear in the direction from each actual sound source to each point of the primary field. The conditions of restoration of rectilinearity of oscillations of air particles in the secondary field are considered and the basic equation of stereophony is deduced. It has been proved that in a general case the multichannel system cannot restore, in the secondary field, the rectilinear oscillations of air particles but transforms them into elliptical ones. It has also been proved that the principal cause of the physical character which makes it impossible to obtain the undistorted localization effect in a general case in all points of the secondary field, is an insufficient velocity of sound in the air. Recommendations are given, taking into consideration the use of the established regularities in such a way as to create a practical possibility of obtaining an excellent and good stereophonic effect in the whole area of the theater.
Publication Date: 1967-02-01
DOI: 10.5594/J09186
ISSN: Print: 0361-4573
Link: https://doi.org/10.5594/J09186
Author(s): Pavel G. TagerCinema and Photo Research Institute (NIKFI), I.eningradsky Prospect 47, Moscow A-57, U.S.S.R.
Copyright: © 1967 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

1. Clark H. A. M. Dutton G. F. Vanderlyn P. B. , “The ‘Stereosonic’ recording and reproducing system,” Proc. I.E.E. , 104 , B : 417 – 432 , Sept. 1957 . EXTERNAL
2. Makita Y. , “Localisation directionnelle du son dans un champ sonore stéréophonique,” Rev. de l'Union Europênne de Radiodiffusion , 73 , A : 102 – 108 , June 1962 . EXTERNAL

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Pavel G. Tager; Some Features of Physical Structure of Acoustic Fields of Stereophonic Systems, Journal of the SMPTE ( Volume: 76, Issue: 2, February 1967); SMPTE, 1967. Available at https://doi.org/10.5594/J09186

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Pavel G. Tager; Some Features of Physical Structure of Acoustic Fields of Stereophonic Systems, Journal of the SMPTE ( Volume: 76, Issue: 2, February 1967); SMPTE, 1967. Available at https://doi.org/10.5594/J09186

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<span class="citation">Pavel G. Tager; <cite>Some Features of Physical Structure of Acoustic Fields of Stereophonic Systems</cite>, Journal of the SMPTE ( Volume: 76, Issue: 2, February 1967); SMPTE, 1967. Available at <a href="https://doi.org/10.5594/J09186" target="_blank" rel="noopener">https://doi.org/10.5594/J09186</a></span>

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Pavel G. Tager; Some Features of Physical Structure of Acoustic Fields of Stereophonic Systems, Journal of the SMPTE ( Volume: 76, Issue: 2, February 1967); SMPTE, 1967
doi: 10.5594/J09186
url: https://doi.org/10.5594/J09186

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<li>
Pavel G. Tager; <cite id="bib-10-5594-j09186">Some Features of Physical Structure of Acoustic Fields of Stereophonic Systems</cite>, Journal of the SMPTE ( Volume: 76, Issue: 2, February 1967); SMPTE, 1967
<span class="doi">10.5594/J09186</span>
</li>