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A 2.75D Model for the Prediction of Noise Inside Buildings Due To Train Traffic

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An existing 2.5D FEM-BEM model is extended to predict sound pressure levels inside buildings. Previous studies have showed that a 2D approach lacks precision. The 2.5D model will approximate volumes as infinite ducts. By introducing a 3D modal-based acoustic model of the volumes, the proposed approach will be one step closer to the full 3D reality. The mixing of 2. 5D and 3D models has been named 2.75D. Two different ways to compute sound radiation are proposed: an energy radiation computation or a 3D modal approach. A comparison of 2.75D and 3D computations has been done in the case of a simple building parallel to the tracks. The validity of this simplified approach is discussed. Last, the engineering approach proposed in the European project RIVAS is compared to the 2.75D model.
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Document Type: Research Article

Publication date: November 1, 2018

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  • Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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