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Effect of Magnetic Field on the Propagation of Sound in Paramagnetic Liquids

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The problem of the effect of magnetic fields on the velocity of sound in paramagnetic fluids is investigated with the help of the Phase-Comparison-Interferometer, which allows the detection of changes in sound velocity right up to about 1 mm/s. A transversal magnetic field up to 104 G was used. Aqueous solutions of a uniform concentration of 1 molar each of the following substances were investigated: ferric chloride, manganese(II) sulphate, ferrous sulphate, cobalt(II) sulphate, nickel(II) sulphate, nickel(II) nitrate, potassium ferricyanide and cupric sulphate. The sound velocity is observed to decrease in the magnetic field, with magnitudes lying between 2 cm/s to about 50 cm/s at a field strength of 5000 G. Up to about 2000 G this change is very small, but increases rapidly at higher fields. In addition to change in the sound velocity, it appears that the absorption coefficient of sound also undergoes a change.
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Document Type: Research Article

Publication date: September 1, 1976

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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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