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Efficiency of Noise Protections in Urban Areas: Predictions and Scale Model Measurements

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This research work aims at creating quiet areas in cities using low height complex shape noise reduction devices. For aesthetic and security aspects, such protectors will not exceed a size of 1 m×1 m in a vertical section. Numerical simulations of their acoustical performance were achieved using a 2D Boundary Element Method (BEM) code developed at CSTB named MICADO. The results show that the effectiveness of such protections is very significant: the noise reduction due to their use may be as high as 6 to 10 dB(A) in the area of interest. Scale model measurements have been carried out at a scale of one to ten; they also confirm this significant effectiveness. There is good agreement between 2D theoretical results and 3D scale model measurements. Such low height protections seem to be particularly effective at low frequencies.
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Document Type: Research Article

Publication date: 2006-07-01

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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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