The impact of the sound reflection model on the ray tracing simulation variability

• Autorzy: Binek Wojciech , Chojak Aleksandra , Kamisiński Tadeusz

Identyfikatory

DOI

10.21008/j.0860-6897.2021.2.03

• Języki publikacji: EN

Abstrakty

EN

Geometrical acoustics is the most commonly used method of room acoustics prediction. Its efficiency can be improved by explicit calculation of ray contribution to each receiver during reflection called algebraic reflection. The aim of this research is to analyse the applicability and impact of reflection model choice on algebraic reflection calculation using the ray tracing with next event estimation. The tested reflection models include the specular and Lambert reflection combination and the Phong reflection model. Classical ray tracing algorithm, without algebraic reflections, is used as a reference. Based on simulation results and statistical analysis we conclude that the change of the reflection model significantly affects the acoustics conditions within the simulation changing echograms in early reflections region and the reverberation times. Statistical analysis proved that echograms obtained with the combination of ray tracing with next event estimation and Phong reflection model have lowest simulation to simulation variability.

Słowa kluczowe

EN

geometrical acoustics; BRDF; diffuse rain; next event estimation

PL

akustyka geometryczna; BRDF; diffuse rain; estymacja następnego zdarzenia

• Wydawca: Poznan University of Technology. Institute of Applied Mechanics
• Czasopismo: Vibrations in Physical Systems
• Rocznik: 2021
• Tom: Vol. 32, nr 2
• Strony: art. no. 2021203
• Opis fizyczny: Bibliogr. 11 poz., il., wykr.

Twórcy

autor

Binek Wojciech

• AGH University of Science and Technology, Mickiewicza Av. 30, 30-059 Cracow, Poland

autor

Chojak Aleksandra

• AGH University of Science and Technology, Mickiewicza Av. 30, 30-059 Cracow, Poland

autor

Kamisiński Tadeusz

• AGH University of Science and Technology, Mickiewicza Av. 30, 30-059 Cracow, Poland

Bibliografia

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• 2. S. Laine, S. Siltanen, T. Lokki, L. Savioja. Accelerated beam tracing algorithm. Appl. Acoust. ,70: 172-181, 2009. DOI: 10.1016/j.apacoust.2007.11.011
• 3. L. Savioja, U. P. Svensson. Overview of geometrical room acoustic modeling techniques. J. Acoust. Soc. Am., 138(2):708-730, 2015. DOI: 10.1121/1.4926438
• 4. ISO 17497-1:2004 Acoustics - Sound-scattering properties of surfaces - Part 1: Measurement of the random-incidence scattering coefficient in a reverberation room. 2004.
• 5. W nek, lc , Ka ń k ppl cat n f f tted t ea e ent nd eflec n del n geometrical acoustics simulations, in INTER-NOISE 2019 MADRID - 48th International Congress and Exhibition on Noise Control Engineering, 2019.
• 6. E. Molin, D. Bard, J. Negreira. Algebraic reflections in geometric acoustics. Proceedings of Meetings on Acoustics, 30(1):22002, 2017. DOI: 10.1121/2.0000621
• 7. E. P. Lafortune. Mathematical Models and Monte Carlo Algorithms for Physically Based Rendering, PhD Thesis, Katholieke Universiteit Leuven, 1995.
• 8. W. Binek. Ray tracing with next event estimation in room acoustics simulations [Metoda promieniowa z estymacją następnego zdarzenia w symulacjach akustyki pomieszczeń], MSc Thesis, Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie, 2016.
• 9. D. Schröder. Physically based real-time auralization of interactive virtual environments. Logos Verlag, Berlin, 2011.
• 10. W. Binek, T. Kamisiński. Adaptation and preliminary evaluation of phong reflection model in room acoustic simulations [Adaptacja i wstępna ewaluacja modelu odbicia Phoga w symulacjach akustyki pomieszczeń]. Postępy Akustyki 2017, 401-411.
• 11. J. Arvo. Applications of Irradiance Tensors to the Simulation of Non-Lambertian Phenomena. Comput. Graph. (SIGGRAPH ’95 Proceedings, 335-342, 1995. DOI: 10.1145/218380.218467

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).