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Sound Radiation from a Point Source Moving in a Layered Fluid on a Plane Surface of Porous Material

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Theoretical investigations are made on the sound radiation from a monopole source moving in a layered fluid on a semi-infinitely extended porous material. The total field in the far-field region is expressed by the sum of the direct wave and the multiple reflection terms. A simple physical interpretation for each reflection term is given.


Es wurden theoretische Untersuchungen durchgeführt über die Schallschwingung einer Monopolquelle, welche sich in einer Flüssigkeit oberhalb eines porösen Materials bewegt, welches einen unendlichen Halbraum ausfüllt. Das gesamte Fernfeld wird durch die Summe aus direktem Anteil und vielfachen reflektierten Anteilen ausgedrückt. Man erhält eine einfache physikalische Interpretation für jeden Reflexionsterm.


On présente une étude théorique de l'émission sonore d'une source monopolaire en mouvement dans un fluide stratifié limité par la surface plane d'une matériau poreux semi-infini. Le champ total dans la région du champ lointain s'exprime par la somme de l'onde directe et de termes provenant de réflexions multiples et dont on donne des interprétations physiques simples.
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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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