In the last decades, wave-based simulation methods have been applied to an increasing number of 3D virtual rooms thanks to the scientific and computational advances in numerical models. However, there is still a lack of adequate material properties required for those simulations, in terms of accessible lists of various frequency-dependent boundary conditions. Such input parameters can be retrieved from sound absorption coefficients, exploiting the availability of several consolidated datasets typically employed in ray-tracing simulations. The present work aims at quantifying and assessing the degree of uncertainty underlying this critical step in non-trivial environments. With this purpose, parallel calibrations have been carried out on distinct case studies based on experimental data using finite-difference time-domain (FDTD) and geometrical acoustics (GA) approaches. The outcomes highlight significant discrepancies at low frequencies between the different input data for various materials, suggesting a potential decrease (up to 45%) in sound absorption coefficient before the conversion to specific acoustic impedances.

UNCERTAINTY OF INPUT DATA FOR WAVE-BASED ROOM ACOUSTIC SIMULATIONS IN LARGE NON-TRIVIAL ENVIRONMENTS / Fratoni G.; D'Orazio D.; Garai M.. - In: PROCEEDINGS OF FORUM ACUSTICUM. - ISSN 2221-3767. - ELETTRONICO. - (2023), pp. 123-130. (Intervento presentato al convegno 10th Convention of the European Acoustics Association, EAA 2023 tenutosi a Politecnico di Torino, Via Paolo Borsellino, 53/N, ita nel 2023) [10.61782/fa.2023.1114].

UNCERTAINTY OF INPUT DATA FOR WAVE-BASED ROOM ACOUSTIC SIMULATIONS IN LARGE NON-TRIVIAL ENVIRONMENTS

Fratoni G.
;
D'Orazio D.;Garai M.
2023

Abstract

In the last decades, wave-based simulation methods have been applied to an increasing number of 3D virtual rooms thanks to the scientific and computational advances in numerical models. However, there is still a lack of adequate material properties required for those simulations, in terms of accessible lists of various frequency-dependent boundary conditions. Such input parameters can be retrieved from sound absorption coefficients, exploiting the availability of several consolidated datasets typically employed in ray-tracing simulations. The present work aims at quantifying and assessing the degree of uncertainty underlying this critical step in non-trivial environments. With this purpose, parallel calibrations have been carried out on distinct case studies based on experimental data using finite-difference time-domain (FDTD) and geometrical acoustics (GA) approaches. The outcomes highlight significant discrepancies at low frequencies between the different input data for various materials, suggesting a potential decrease (up to 45%) in sound absorption coefficient before the conversion to specific acoustic impedances.
2023
Proceedings of Forum Acusticum 2023
123
130
UNCERTAINTY OF INPUT DATA FOR WAVE-BASED ROOM ACOUSTIC SIMULATIONS IN LARGE NON-TRIVIAL ENVIRONMENTS / Fratoni G.; D'Orazio D.; Garai M.. - In: PROCEEDINGS OF FORUM ACUSTICUM. - ISSN 2221-3767. - ELETTRONICO. - (2023), pp. 123-130. (Intervento presentato al convegno 10th Convention of the European Acoustics Association, EAA 2023 tenutosi a Politecnico di Torino, Via Paolo Borsellino, 53/N, ita nel 2023) [10.61782/fa.2023.1114].
Fratoni G.; D'Orazio D.; Garai M.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/970418
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