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Modeling the Sound Fields in Rooms with Multiple Sources Using a Hybrid Image Method Including Phase

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The characteristics of an enclosed sound field excited by multiple sources are different from the case in which there is only one point source, especially when these sources have the same frequency and are placed closely. In this paper, the beam tracing method and the image source method are combined to model sound propagation throughout an enclosure. The hybrid image method, in which the phenomenon of interference is considered, has been developed to model the behaviors of multiple sources. Image sources of each source are computed by backtracing the conical beams, and their contributions are summated to calculate the sound pressure at any individual receiving point. The directivity and time delay of each source, which will have an affect on sound distribution, have also been considered in the model. Comparison between measurement and prediction has shown that the model has correctly simulated the characteristics of a sound field excited by multiple sources.
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Document Type: Research Article

Publication date: January 1, 2002

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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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