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Grundzüge einer neuen Theorie und Systematik des frequenzunabhängigen Anteils der Schallabsorption in Flüssigkeiten

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A new theory for the absorption of sound in liquids is put forward, which does not treat the frequency-independent component as function of viscosity and heat conductivity, but as function of the volume of the molecules and of a collision factor, which is derived from the shape of the molecules. Both volume and collision factor may be calculated from the velocity of sound or from addition theorems. This theory leads to a better understanding of the inherent relations between absorption of sound, velocity of sound and chemical structure. Absorption components caused by vibrational relaxation or by structural relaxation are clearly discerned from the calculated values of ordinary absorption. It is possible to decide from a single measurement, whether or not relaxational processes may be found in a given liquid.
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Document Type: Research Article

Publication date: January 1, 1961

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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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