S. Vandenplas et al., Parametric modeling with beamspread compensation and MIMO frequency domaininversion applied to fine saturated sands, IEEE ULTRAS, 48(4), 2001, pp. 985-997
Citations number
27
Categorie Soggetti
Optics & Acoustics
Journal title
IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL
A system identification technique is applied to estimate the intrinsic abso
rption and dispersion of two fine sands. The method is based on the paramet
ric modeling of the wave propagation through a Plexiglas tank filled with t
he sediment under investigation. The applicability of various porous models
is discussed. The viscoelastic constant Q model and viscoelastic rational
form model are applied and compared. Closed form expressions describing the
wave propagation are replaced by Debye series expansions with correction c
oefficients that consider the beamspread caused by the finite aperture of t
he emitter. A multiple input multiple output (MIMO) representation is used
in conjunction with the maximum likelihood estimator (MLE) for the estimati
on of the sediment parameters. The estimated absorption and dispersion curv
es are depicted.