Title: On the influence of frequency and width of an ultrasonic bounded beam in the investigation of materials - study in terms of heterogeneous plane-waves
Authors: Van Den Abeele, Koen ×
Leroy, Oswald #
Issue Date: May-1993
Publisher: Amer inst physics
Series Title: Journal of the acoustical society of america vol:93 issue:5 pages:2688-2699
Abstract: Theoretically obtained three-dimensional plots showing the behavior of the reflection coefficient for heterogeneous plane waves upon arbitrary layered media as function of incidence angle and heterogeneity, supply valuable information for the investigation of the reflector when using bounded ultrasonic beams. The presence of leaky interface modes and their angular positions for a specific sample are determined by the fd products (frequency times thickness) of the constituent layers. Deformations of the reflected and transmitted bounded beam profiles and the contribution of surface wave radiation (leaking energy) at vibrational mode angles are governed by the f W product (frequency times beamwidth). For a given layered medium, optimum conditions for observing particular mode vibrations and large deformations of reflected ultrasonic profiles can be predicted theoretically.
ISSN: 0001-4966
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Physics, Campus Kulak Kortrijk
× corresponding author
# (joint) last author

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