MODELING THE SOUND FIELD INSIDE AN ENCLOSURE USING “RAY–TRACING“ METHOD
: In this paper, a program developed in C applying the "ray-tracing" method was used to study the distribution of sound energy inside an enclosure. The geometric problem was solved, which includes: defining the boundaries of the enclosure, setting the positions of source and receiver. The followings were calculated: positions of the sound rays leaving the source, the points of intersection with the obstacles, directions of the reflected rays. This process continues until every ray travels a way of a predefined length. Another step in this study is to determine the absorption due to obstacles and attenuation of sound ray in the air, the maximum length of the path covered by the sound ray - direct and reflected - defining the level of sound pressure.Key words: ray-tracing method, sound field modeling, acoustics, sound power
Fahy, F., Foundation of Engineering Acoustics, Academic Press, 2001, 450 pp
Fahy, F., Gardonio, P., Sound and Structural Vibration. Radiation, Transmission and Response, Academic Press, 2007, 643 pp.
Filippi, P. a. o., Acoustics. Basic physics, theory and methods, Elsevier, 1999, 315 pp
Keränen, J. a. o., Validity of the ray-tracing method for the application of noise control in workplaces, Acustica-Acta Acustica, vol. 89, 2003, pp. 863-874
Rindel, J. H., The use of computer modeling in room acoustics, Journal of Vibroengineering, 2000, No. 3(4), pp. 219-224
Spencer, G. H., Murty, M. V. R. K., General ray-tracing procedure, Journal of the Optical Society of America, Vol. 52, No. 6, 1962, pp. 672-678
Ursu-Fischer, N., Ursu, M., Numerical methods in engineering and programs in C/C++, (in Romanian), vol. I, Casa Cărţii de Ştiinţă, Cluj-Napoca, 2000, 282 pp
Ursu – Fischer, N., Ursu, M., Programming with C in engineering (in Romanian), Casa Cărţii de Ştiinţă, Cluj- Napoca, 2001, 404 pp
Ursu-Fischer, N., Popescu, Diana Ioana, The ray – tracing method in acoustics and the estimation of acoustic field parameters Acta Technica Napocensis, Series Applied Mathematics and Mechanics, No. 53, Vol. III, 2010
Ursu-Fischer, N., Popescu, Diana Ioana, Some geometrical aspects of the ray – tracing method in acoustics, Acta Technica Napocensis, Series Applied Mathematics and Mechanics, No. 53, Vol. III, 2010
Wayman, J. L., Computer simulation of sound fields using ray methods, University of California, Santa Barbara, PhD Thesis, July 1980
Zhang, X., Chen, K., Sun, J., On the accuracy of the ray-tracing algorithm based on various sound receiver models, Applied Acoustics, Volume 64, Issue 4, 2003, pp. 433-441
Zhang, C., Zhang, Y., A generalized ray-tracing algorithm for integrated visual and auditory rendering in room acoustics, Civil Eng. and Environ. Syst., 2001, vol. 18, pp. 19-34
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