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A Model Theory for the Fibrous Absorber, Part I: Regular Fibre Arrangements

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The axial propagation of sound waves in a model consisting of parallel fibres will be calculated. The viscous forces and the thermal conduction are taken into account. This will lead to viscous waves and to thermal waves besides the usual acoustic compressional wave. The potential function for the total field near a fibre will be treated as the superposition of the radiated field from the fibre itself and of the scattered fields from all the other fibres. The explicit field equations for a regular square fibre arrangement will be derived and the influence of the order of symmetry of the arrangement will be discussed. This will lead to simplifications in the field equations and to field equations for the case of a homogeneous fibre distribution.
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Document Type: Research Article

Publication date: October 1, 1976

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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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