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Abstrahlverhalten von Wänden

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It is found by theoretical considerations that normal radiation behaviour of plates occurs for λB > λL and abnormally small radiation for λB λ λL. In the first case the behaviour of a plate excited by flexural waves is almost equivalent to a vibrating piston and, whenever the dimensions of the plate exceed λB, neither the internal damping nor the dimensions have any influence in this case. In the range of abnormal radiation however, these parameters, primarily the dimensions of the plate, are of great importance. The decrease in radiation amounts 10 to 20 dB.

The calculation from the vibration amplitudes of the walls and ceilings of the sound radiated into air is quite possible for thick walls with a low limiting frequency, but difficulties arise in the case of thin walls because there sometimes exists a mixture of free and forced vibrations with different wave lengths for a given frequency.
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Document Type: Research Article

Publication date: January 1, 1956

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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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