Activities per year
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.
| Original language | English |
|---|---|
| Title of host publication | Inter-Noise 2024 |
| Publisher | INTERNATIONAL INSTITUTE OF NOISE CONTROL ENGINEERING |
| Publication status | Published - Aug 2024 |
| Event | 53rd International Congress & Exposition on Noise Control Engineering: INTER-NOISE 2024 - Nantes, France Duration: 25 Aug 2024 → 29 Aug 2024 |
Conference
| Conference | 53rd International Congress & Exposition on Noise Control Engineering |
|---|---|
| Abbreviated title | Inter-Noise 2024 |
| Country/Territory | France |
| City | Nantes |
| Period | 25/08/24 → 29/08/24 |
Fingerprint
Dive into the research topics of 'Comparing outdoor sound propagation simulation methods based on geometrical and numerical methods'. Together they form a unique fingerprint.Activities
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53rd International Congress & Exposition on Noise Control Engineering
Florian Kraxberger (Participant)
25 Aug 2024 → 29 Aug 2024Activity: Participation in or organisation of › Conference or symposium (Participation in/Organisation of)
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Comparing outdoor sound propagation simulations based on geometrical and numerical methods
Florian Kraxberger (Speaker), Christian Adams (Contributor), Julia Donnerer (Contributor), Manfred Kaltenbacher (Contributor) & Stefan Schoder (Contributor)
26 Aug 2024Activity: Talk or presentation › Talk at conference or symposium › Science to science