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Composition Dependence of Ultrasonic Absorption in Critical Binary Liquid Systems

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The composition dependence of ultrasonic absorption for four critical binary liquid systems, viz., n-octane-nitrobenzene, n-nonane-nitrobenzene, n-heptane-o-toluidine and iso-octane-o-toluidine has been explained using Fixman theory together with Flory-Huggins theory. It has been observed that the theory indicates only the existence of a well defined maximum in a α/f 2 versus composition curve, but does not predict the exact shape of the absorption curve and the position of the absorption peak.


Unter Verwendung der Fixmanschen und der Flory-Hugginsschen Theorien wird die Abhängigkeit der Ultraschallabsorption von der Zusammensetzung für vier kritische Zwei-Flüssigkeits-Systeme, nämlich n-Oktan-Nitrobenzol, n-Nonan-Nitrobenzol, n-Heptan-o-Toluidin und Iso-Oktan-o-Toluidin erklärt. Es wurde beobachtet, daß die Theorien lediglich eine Aussage über das Vorhandensein eines wohldefinierten Maximums der Absorptionskurven (α/f 2 als Funktion der Zusammensetzung) machen, nicht aber über die genaue Form der Kurven und die Lage der Absorptionsspitze.


L'influence de la composition sur l'absorption acoustique a été expliquée au moyen des théories de Fixman et de Flory-Huggins, à propos des quatre mélanges critiques suivants: n-octane et nitrobenzene, n-nonane et nitrobenzene, n-heptane et o-toluidine, iso-octane et o-toluidine. La théorie indique l'existence d'un maximum bien défini sur la courbe du rapport α/f 2 en fonction de la composition, mais elle ne prédit pas la forme exacte de la courbe d'absorption ni la position du maximum d'absorption.
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Document Type: Research Article

Publication date: October 1, 1978

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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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