Conveners
A05.04 Outdoor sound propagation: S244
- Christian Adams (Graz University of Technology)
- Timothy Van Renterghem (Ghent University)
- Martin Czuka (AIT Austrian Institute of Technology)
A05.04 Outdoor sound propagation: S367
- Martin Czuka (AIT Austrian Institute of Technology)
- Christian Adams (Graz University of Technology)
- Timothy Van Renterghem (Ghent University)
A05.04 Outdoor sound propagation: S528
- Christian Adams (Graz University of Technology)
- Martin Czuka (AIT Austrian Institute of Technology)
- Timothy Van Renterghem (Ghent University)
A05.04 Outdoor sound propagation: P455
- Timothy Van Renterghem (Ghent University)
- Martin Czuka (AIT Austrian Institute of Technology)
- Christian Adams (Graz University of Technology)
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Frits Van der Eerden (TNO)10/09/2026, 14:20A05 Environmental Acoustics
The impulsive sound of large caliber weapons or explosions can travel over long distances. To calculate the sound levels at some distance from the source, a linear propagation model and therefore a linear acoustic source strength is used, in general. Nonlinear propagation effects for the shock wave, relatively close to the source, are not taken into account. By measuring the source strength at...
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Lennart Bouma (National Institute for Public Health)10/09/2026, 14:40A05 Environmental Acoustics
In the Netherlands, two models are used for official environmental sound propagation calculations: the national MRG model (similar to the ISO 9613-2 model) and the European CNOSSOS model. A key difference between these models is the calculation of ground attenuation, which can lead to differences of up to 10-20 dB in certain octave bands. Such differences can have a significant impact on the...
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Josephine Pockelรฉ (Delft University of Technology)10/09/2026, 15:00A05 Environmental Acoustics
Ground reflections play an important role in the propagation of wind turbine noise and significantly affect noise assessment. For simplicity, most best-practice wind turbine noise prediction models treat the entire wind turbine as a point source, typically located at the rotor hub. Nevertheless, the main noise generation mechanism in modern wind turbines is better represented by a line source...
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Sean Horsman (University of Galway)10/09/2026, 15:20A05 Environmental Acoustics
Environmental sound propagation over water is usually modelled by treating the surface as acoustically hard and, perhaps more importantly, stationary. This simplification does not account for the possible influence of surface motion on the coherence of the surface-reflected sound field. In these tests, surface motion was generated using a simple ripple-making system in an outdoor shallow-water...
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Zachary Simcox (University of Salford)10/09/2026, 15:40A05 Environmental Acoustics
Explosive Depth Hardening (EDH) is an industrial process in which plastic explosives are used to com press and work-harden steel. Depending on the steelthat needs hardening, the energy equivalent of up to 10 kg of TNT is used. Depending on the shipments, between one and 4 rails are hardened simultaneously.The nearest noise sensitive receptor is approximately 2 km from the source, and under...
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Thibaud Thรฉnint (EDF DTG)10/09/2026, 16:20A05 Environmental Acoustics
EDF must ensure the regulatory compliance of most of its electricity generation facilities, including nuclear power plants, wind farms, combined-cycle gas turbines, and diesel engines. With regard to environmental acoustics, this requires verifying sound pressure levels at site boundaries and at the nearest residential receptors. These verifications are based on field measurements. However,...
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Mikel Amatriain (RWE Renewables Iberia)10/09/2026, 16:40A05 Environmental Acoustics
Largeโscale photovoltaic (PV) installations introduce extensive inclined planar surfaces that can act as screening elements but also as reflective structures. This can influence sound propagation from the source to the receiver. While PV plants are often assessed primarily as noise sources themselves; however, the role of PV panels as barriers and/or reflectors affecting sound from other noise...
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Pascal Palenda (IHTA, RWTH Aachen University)10/09/2026, 17:00A05 Environmental Acoustics
The simulation of urban environments poses challenges for geometric propagation models.In these scenarios, diffraction is a significant contribution to sound propagation.The image edge model was proposed as an efficient method to determine diffraction paths.In combination with the Unified Theory of Diffraction (UTD), it can be used to calculate the diffraction contribution to sound...
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Rafael Castro Mota (Physikalisch-Technische Bundesanstalt)10/09/2026, 17:20A05 Environmental Acoustics
Winds and spatial variations in temperature can strongly affect the outdoor propagation of low-frequency sound. Under downward-refracting conditions, atmospheric waveguides can form, allowing sound to reach greater detection ranges. In our research, we use an inverse method to predict the propagation of sound from outdoor sound sources into the far-field. The method hinges on a two-dimensional...
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Sophia Feriani (Empa)10/09/2026, 17:40A05 Environmental Acoustics
In the field of outdoor acoustics, the sound propagation is impacted by meteorological conditions, including atmospheric turbulence which causes significant fluctuations in the sound pressure. To numerically model the propagation of sound in an inhomogeneous atmosphere, the quasi-wavelet approach is a useful representation of the random turbulent field created by temperature and...
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Pierre Aumond (UMRAE)11/09/2026, 08:40A05 Environmental Acoustics
Ensuring that warning sirens are audible to the population during natural disasters, technological accidents, or security crises remains a key challenge in emergency planning, while their spatial deployment is still not systematically optimized on their audibility. This study proposes a two-step approach. In France, public warning sirens are tested every first Wednesday of the month at noon....
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Pascal Palenda (IHTA, RWTH Aachen University)11/09/2026, 09:00A05 Environmental Acoustics
The simulation of urban sound propagation is challenged by the strong impact of diffraction around building edges.Although several geometric propagation models can account for diffraction, their validation is hindered, because real-world measurements are inherently noisy or do not exist.For this reason, this work presents a database of scale-model measurements specifically designed for urban...
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Bill Kayser (Cerema)11/09/2026, 09:00A05 Environmental Acoustics
Accurate prediction of aircraft noise requires numerical models capable of considering sound propagation from a source in motion. In Kayser et al. [Acta Acustica, 8, 62], we proposed a ray-tracing model based on a heuristic formulation that explicitly accounts for moving source phenomena, including Doppler shift and convective amplification, together with sound propagation in inhomogeneous...
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Fabrice JUNKER (EDF-DTG)11/09/2026, 09:20A05 Environmental Acoustics
The French standard NF S 31-120 defines methods for characterizing meteorological conditions and ground properties relevant to outdoor sound propagation. For meteorological characterization, the standard proposes three approaches:(i) a classification method based on a meteorological analysis grid (UiTi),(ii) a method based on measurements of the acoustic velocity gradient, and(iii) a...
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Wolfgang Probst (DataKustik GmbH)11/09/2026, 09:40A05 Environmental Acoustics
The author served as chairman of ISO TC43 SC1 WG61, the working group responsible for the revision of ISO 9613-2, and presents key findings from the analysis of the sound propagation model defined in this standard.Although the formalism is simple and clearly structured, particular attention is required for the complex interaction between ground attenuation and barrier attenuation. The impact...
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