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Sound Radiation from a Point Source Moving Vertically to a Plane Surface of Porous Material

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Theoretical investigations are made on the problem of sound radiation from a point source moving vertically to a plane surface of porous material. The asymptotic form of the radiation field is obtained from the solution of a boundary value problem in a whole space. A simple physical interpretation of the reflected wave in the far-field region is given.


Es wurden theoretische Untersuchungen über das Problem der Schallschwingung einer Punktquelle durchgeführt, welche sich vertikal zu einer ebenen Oberfläche aus porösem Material bewegt. Die asymptotische Form des Schwingungsfeldes wurde durch die Lösung eines Randwertproblems über den gesamten Raum gewonnen. Man erhält eine einfache physikalische Interpretation der reflektierten Welle im Fernfeld.


On présente une étude théorique de l'émission sonore d'une source ponctuelle se déplaçant verticalement à la surface plane d'un matériau poreux. La solution du problème aux limites correspondant fournit une expression asymptotique du champ rayonné. On obtient également une interprétation physique simple de l'onde réfléchie dans la région du champ lointain.
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Document Type: Research Article

Publication date: June 1, 1981

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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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