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Development of 3D Acoustic Multi-Domains Analysis Using an Indirect Energy Flow Boundary Element Method

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Energy flow analysis has been developed and studied by many researchers to analyze acoustic energy in the medium to high frequency ranges. In this paper, a method to solve the 3D acoustic multi-domain problem by adopting an indirect approach to the EFBEM (Energy Flow Boundary Element Method) is proposed. A joint matrix comprised of power transmission and reflection coefficients is used to describe the energy exchanges between domains and absorption coefficients are applied to consider an energy absorbing boundary condition. Finally, coupled small reverberation rooms and a mock-up system of ship cabins were analyzed using the method to compare the numerical analysis with the experimental results. They show good agreement, thereby validating the method. The indirect EFBEM method allows us to use spherical wave Green's functions, which are not available in the direct method. Therefore, it is expected that the method can be applied to almost any acoustic multi-domain situation, from room to room cases to radiation problems.
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Document Type: Research Article

Publication date: May 1, 2017

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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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