Naslov
The effect of refraction as a non-linear transformation on beam tracing simulation of sound propagation

Autori
Sikora, Marjan ; Mateljan, Ivo ; Bogunović, Nikola

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of 1st European Acoustics Association Euroregio Congres on Sound and Vibration / - , 2010

Skup
1st European Acoustics Association Euroregio Congres on Sound and Vibration

Mjesto i datum
Ljubljana, Slovenija, 15.09.2010. - 18.09.2010

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Computer simulation ; Beam tracing ; Acoustics ; Refraction

Sažetak
Comprehensive beam tracing method is a simulation method that calculates refraction as well as reflection of sound. Due to the non-linear nature of Snell’s law, refraction (in contrast to reflection) is not a linear transformation. Because of this triangular beams used in comprehensive beam tracing simulation lose focus after refraction. In this paper the problem of non-linearity of refraction of beams is discussed. The solution used in comprehensive beam tracing method is an approximation used during calculation of geometry of refracted beams. This approximation is presented, and the error induced by this approximation is analyzed. Using the comprehensive beam tracing method, the propagation of ultrasound in a simple scene is simulated. Results obtained with this simulation are compared with theoretical prediction in order to check the influence of the approximation. Results show that error induced by approximation can be tolerated, especially for narrow beams, and for environments where speed of sound between different entities doesn't differ much.

Izvorni jezik
Engleski

Znanstvena područja
Računarstvo

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