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Reverberation in Rectangular Long Enclosures with Geometrically Reflecting Boundaries

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In this paper theoretical formulae for calculating the reverberation in rectangular long enclosures with geometrically reflecting boundaries are derived by applying the image source model. The theory has been validated by the measurements in a corridor. Computations with these formulae show that in long enclosures: with the increase of source-receiver distance, the reverberation time increases sharply to a maximum and then decreases slightly; the decay curves are convex, especially in the near field; with air absorption, the decay curves are more linear; with the same cross-sectional form, the reverberation time increases with the increase of cross-sectional area, and this increase is more significant for a longer source-receiver distance; with the same cross-sectional area, the reverberation time is the longest when the section is square; highly reflective end walls could increase the reverberation significantly; the reverberation could be adjusted by using a directional source and; the reverberation of multiple sources is longer than that caused by the nearest source alone. An auditorium-like enclosure is also analysed.
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Document Type: Research Article

Publication date: May 1, 1996

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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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