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Dissipation of Ultrasonic and Audible Sound Waves in Liquid Foams

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Recent results have shown the rich dynamical properties of liquid foams when submitted to an acoustic wave. However the mechanisms responsible for the observed strong attenuation are still unclear. In this paper we collect and compare the main results concerning dissipation of two separate studies investigating the propagation of sound waves in liquid foams. The first one [1] developed a model to describe the different behaviours observed at ultrasonic frequency (60–600 kHz); a reasonable agreement with experiments was found by adding a phenomenological term of dissipation. In the second study [2] the measurement of a dissipative term of unknown origin was performed in the audible range (0.2–5 kHz). The aim of the present paper is to make a link between the dissipation found in these two studies: by comparing the results, we find a similar value for both dissipation terms, suggesting a common origin, even if they emerge in completely different frequency ranges.
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Document Type: Research Article

Publication date: March 1, 2018

More about this publication?
  • 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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