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Spectral Analysis of the Scattering of Acoustic Waves from a Fluid Cylinder, II: Denser Fluid Inside

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The scattering of acoustic waves from an infinite cylindrical fluid obstacle of greater density than the loading medium is investigated. The two cases of a glycerine cylinder in water and of a mercury cylinder in alcohol are discussed. Together with the previously considered case of an air-cylinder in water, they show the dependence of the position and width of the peaks of the internal resonances on the ratio between the external and internal densities and the sound velocities and on the incidence angle.


Es wird die Streuung von Schallwellen an einem unendlichen, zylindrischen fluiden Hindernis untersucht, dessen Dichte größer ist als die des umgebenden Mediums. Dabei werden zwei Fälle, nämlich die eines Glyzerinzylinders in Wasser und eines Quecksilberzylinders in Alkohol diskutiert. Zusammen mit dem früher betrachteten Fall eines Luftzylinders in Wasser zeigen sie, wie die Lage und Breite der Spitzen der inneren Resonanzen von dem Verhältnis zwischen der äußeren und der inneren Dichte, von den Schallgeschwindigkeiten und vom Einfallswinkel abhängen.


On étudie la diffraction des ondes acoustiques par un obstacle constitué d'un cylindre infini fait d'un fluide dense plongé dans un fluide moins dense. On a examiné plus particulièrement les deux cas d'un cylindre de glycérine plongé dans l'eau et d'un cylindre de mercure plongé dans l'alcool. Ensemble avec le cas d'un cylindre d'air plongé dans l'eau, ils montrent que la position et la largeur des résonances internes de l'obstacle dépendent du rapport des densités des deux fluides, des célérités du son dans les deux fluides et de l'angle d'incidence de l'onde.
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Document Type: Research Article

Publication date: 1986-07-01

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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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