Wave Based Modeling of Vibration Transmission Across Junctions Composed of Rectangular Single and Double Walls
A wave based model (WBM) is developed for the prediction of flanking transmission across rigid junctions composed of rectangular single and double walls. Heavyweight cavity walls are commonly used as party wall between row houses and apartment buildings. For these structures, the modal coupling can influence the structureborne sound transmission in a broad frequency range, resulting in a large variability in vibration transmission with varying source position and plate dimensions. Ensemble average WBM results for concrete double wall junctions are compared with statistical energy analysis (SEA) results. The vibration transmission between identical plates is reasonably well predicted by SEA, even when the modal overlap factor and mode count are low. SEA however strongly overestimates the vibration transmission between non-identical plates in the lower frequency range. The vibration transmission across single and double wall junctions shows the same trends, but the vibration attenuation is generally larger for double wall junctions. A parametric study further shows the influence of plate thickness and cavity width on the vibration transmission across concrete double wall junctions, and the expected variability with plate dimensions commonly encountered in buildings.
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Document Type: Research Article
Publication date: November 1, 2016
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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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