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Reduction Index and Boundary Conditions for a Wall Between Two Rectangular Rooms. Part II: Experimental Results

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The reduction index is measured for a concrete wall between two rectangular rooms with equal dimensions. The absorptions in the rooms are varied and the measurements are made with and without diffusors. It is found that the reduction index depends on the absorptions in both rooms and on the character of the fields. The measurements show the error caused in the reduction index when the absorption in the source room is neglected and when there are no diffusors in the rooms. The experiments with and without diffusors confirm the theoretical results derived in Part I.
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Document Type: Research Article

Publication date: January 1, 1972

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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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