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Abstract
Conventional simulations of outdoor noise propagation often rely on geometrical acoustic methods
such as ray tracing or mirror sources. Especially for low frequencies, these methods deliver physically
implausible results due to their inherent approach not resolving the properties of the acoustic field.
In this contribution, the results of a conventional noise propagation simulation software based on
geometrical acoustics are compared to numerical results originating from solving the Helmholtz
equation with the Finite Element Method (FEM). A 2.6 km long cross-section through an alpine
valley with a railway line is considered as an exemple. In comparison with the FEM results, the
shortcomings of geometrical acoustic methods are demonstrated, which underline the need for
powerful and computationally efficient numerical approaches for outdoor noise propagation.
such as ray tracing or mirror sources. Especially for low frequencies, these methods deliver physically
implausible results due to their inherent approach not resolving the properties of the acoustic field.
In this contribution, the results of a conventional noise propagation simulation software based on
geometrical acoustics are compared to numerical results originating from solving the Helmholtz
equation with the Finite Element Method (FEM). A 2.6 km long cross-section through an alpine
valley with a railway line is considered as an exemple. In comparison with the FEM results, the
shortcomings of geometrical acoustic methods are demonstrated, which underline the need for
powerful and computationally efficient numerical approaches for outdoor noise propagation.
Originalsprache | englisch |
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Titel | INTER-NOISE and NOISE-CON Congress and Conference Proceedings |
Herausgeber (Verlag) | INTERNATIONAL INSTITUTE OF NOISE CONTROL ENGINEERING |
Seiten | 2719-2730 |
DOIs | |
Publikationsstatus | Veröffentlicht - Aug. 2024 |
Veranstaltung | 53rd International Congress & Exposition on Noise Control Engineering: INTER-NOISE 2024 - Nantes, Frankreich Dauer: 25 Aug. 2024 → 29 Aug. 2024 |
Konferenz
Konferenz | 53rd International Congress & Exposition on Noise Control Engineering |
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Kurztitel | Inter-Noise 2024 |
Land/Gebiet | Frankreich |
Ort | Nantes |
Zeitraum | 25/08/24 → 29/08/24 |
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53rd International Congress & Exposition on Noise Control Engineering
Kraxberger, F. (Teilnehmer/-in)
25 Aug. 2024 → 29 Aug. 2024Aktivität: Teilnahme an / Organisation von › Konferenz oder Fachtagung (Teilnahme an/Organisation von)
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Comparing outdoor sound propagation simulations based on geometrical and numerical methods
Kraxberger, F. (Redner/in), Adams, C. (Beitragende/r), Donnerer, J. (Beitragende/r), Kaltenbacher, M. (Beitragende/r) & Schoder, S. (Beitragende/r)
26 Aug. 2024Aktivität: Vortrag oder Präsentation › Vortrag bei Konferenz oder Fachtagung › Science to science