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Propagation of Ultrasound Waves in Concentrated Suspensions

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We have measured the phase velocity and attenuation of a coherent acoustical wave propagating in a macroscopic suspension. The frequency range corresponds to resonant scattering of particles (kd ∼ π, where k is the wave vector and d the diameter of particles), at high concentrations (5% to 30%). We have developed a spectral method to measure the velocity and the attenuation on a wide band of frequency, by means of signal processing using Fast Fourier Transform. The results are compared with an effective medium theory (Waterman and Truell). We obtain a good agreement, even for the resonant scattering frequency range.
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Document Type: Research Article

Publication date: 2000-09-01

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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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