Phonons in porous media at intermediate frequencies

J. H. Page, W. K. Hildebrand, J. Beck, R. Holmes, J. Bobowski

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Scopus citations

Abstract

Using ultrasonic techniques, the phonon diffusion coefficient and density of states have been measured at intermediate frequencies in a porous solid network of sintered glass beads. A transition to a very strong scattering regime is observed, whereupon the diffusion coefficient becomes independent of frequency. Near crossover, the density of states is enhanced and exhibits a broad maximum. These data are in good overall agreement with a lattice-based percolation model, and give additional insight into the effects of strong scattering on phonon transport in disorderd media.

Original languageEnglish (US)
Title of host publicationPhysica Status Solidi C: Conferences
Pages2925-2928
Number of pages4
Volume1
Edition11
DOIs
StatePublished - 2004

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