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Excess Ultrasonic Absorption in Water and Primary Alcohols

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The excess ultrasonic absorption in water and alcohols has been evaluated by calculating the relaxation time τ = β 0(η v+4/3μ) and the relaxing compressibility

β = β 0 η v/(η v+4/3 μ)

There is good agreement between the ultrasonic absorption calculated using the above values of β r and τ and the experimental value of excess ultrasonic absorption, the error being less than ±1%. From the values of β r and τ, ΔV, the volume difference, and ΔF, the free energy difference and their temperature dependence can be calculated. ΔV and ΔF obtained from this method compare favourably with the value of the same parameters reported by other investigators in the case of water.
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Document Type: Research Article

Publication date: July 1, 1972

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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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