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Methoden zur Messung der Diffusität in Hallräumen

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In two earlier papers it was shown that a number of quantities that could be measured in a room, acoustically, were either not at all, or but loosely, related to the diffusion of the sound field. This paper attempts to make a constructive contribution to the measurement of diffusion. The diffusion is defined as the angular distribution of sound energy flux, in accordance with the definition that has found its visible expression in Meyer's and Thiele's “sound-hedgehog”. The problem is how, with sufficient angular accuracy and without disturbing the sound field noticeably, to make measurements in a reverberation chamber, the linear dimensions of which are comparable to the wavelength. It is solved by spectral analysis of the sound field at the measuring wall. The angular accuracy attained by this method is equivalent to that of an area antenna the dimensions of which considerably exceed those of the measuring wall.
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Document Type: Research Article

Publication date: January 1, 1959

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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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