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Efficient FDTD-PE Model for Sound Propagation in Situations with Complex Obstacles and Wind Profiles

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An efficient hybrid model is presented for sound propagation in situations with several reflecting obstacles near the source. A Finite-Difference Time-Domain (FDTD) model is used in the complex source region, while a Parabolic Equation (PE) model is used for propagation to a distant receiver. The models are coupled by transformation of FDTD results at the boundary of the source region from the time domain to the frequency domain. The FDTD-PE model takes into account multiple reflections of sound waves in the source region, and interaction of sound waves with complex wind fields near the obstacles. It is shown that the FDTD-PE model is accurate, and requires considerably smaller computer times and memory than FDTD does.
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Document Type: Research Article

Publication date: 01 July 2005

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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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