Diffusive transport of acoustic waves in strongly scattering media

Citation
Jh. Page et al., Diffusive transport of acoustic waves in strongly scattering media, PHYSICA B, 263, 1999, pp. 37-39
Citations number
8
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICA B
ISSN journal
0921-4526 → ACNP
Volume
263
Year of publication
1999
Pages
37 - 39
Database
ISI
SICI code
0921-4526(199903)263:<37:DTOAWI>2.0.ZU;2-D
Abstract
The diffusive transport of multiply scattered ultrasonic waves is investiga ted experimentally and theoretically in a simple system consisting of glass beads in water. New experimental results are presented using a novel metho d for measuring the frequency correlation function of the transmitted acous tic field. The wave diffusion coefficient D is found to vary strongly with frequency when the wavelength is comparable to the size of the scatterers, reflecting a substantial slowing down of wave propagation when the scatteri ng is strongest. The results are interpreted using a model based on a spect ral function approach that gives good agreement with experiment. (C) 1999 E lsevier Science B.V. All rights reserved.