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Sound Wave Propagation in Cylindrical Inhomogeneus Waveguides

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We have studied the propagation of acoustic waves through a moving fluid confined in a cylindrical tube with a rigid wall. Modal patterns and propagation constants of the guided modes in such a waveguide are obtained. Focusing/defocusing of a weakly converging/diverging spherical acoustic beam has also been discussed.


Es wurde die Ausbreitung von Schallwellen in einer bewegten Flüssigkeit innerhalb eines zylindrischen Rohres mit starrer Wand untersucht. Dabei wurden die Wellenformen und die Ausbreitungskonstanten der geführten Wellen in einem solchen Wellenleiter ermittelt. Des weiteren wird die Fokussierung bzw. Defokussierung einer schwach konvergierenden bzw. divergierenden Kugelwelle diskutiert.


On a étudié la propagation d'ondes acoustiques à travers un fluide en mouvement dans un tube cylindrique à paroi rigide. Les diagrammes des modes guidés ont été calculés, ainsi que leurs constantes de propagation. On discute également de la focalisation (ou de la défocalisation) d'un faisceau sphérique faiblement convergent (ou divergent) se propageant dans un tel tube.
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Document Type: Research Article

Publication date: January 1, 1979

More about this publication?
  • 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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