Acoustic double-reflection and transmission at a rough water-solid interface

Journal Article · Wed Jun 01 04:00:00 EDT 1994 · Journal of the Acoustical Society of America; (United States)

DOI:https://doi.org/10.1121/1.409988· OSTI ID:7198015

Rose, J H; Bilgen, M ^[1]; Nagy, P B ^[2]

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1. Iowa State Univ., Ames, IA (United States)
2. Ohio State Univ., Columbus, OH (United States)

The double interaction of a wave with a rough interface is important in many acoustic measurements. An acoustic beam that reflects twice from a rough water-solid interface is considered. The second reflection from the rough surface is accomplished after the transducer's buffer rod is used as an acoustic mirror. Changes in the spatially averaged specular reflection are related to the phenomenon of [open quotes]enhanced backscatter,[close quotes] previously observed for diffuse scattering. Simple, approximate closed-form analytic formulas for the strength of the specular double reflections are given as a function of frequency and the stand-off distance of the transducer. As one application of the analytic results, a method is proposed for determining the surface correlation function from the specular double reflections. The same physics (and appropriately modified analytic formulas) apply to doubly transmitted waves. Experimental measurements have been made of acoustic double reflection with a normally oriented broadband piezoelectric transducer near a rough water-solid interface. Measurements of (1) the wave reflected once from the rough interface, and (2) the wave reflected twice from the rough interface are given. 14 refs., 9 figs.

• OSTI ID: 7198015
• Journal Information: Journal of the Acoustical Society of America; (United States), Journal Name: Journal of the Acoustical Society of America; (United States) Vol. 95:6; ISSN 0001-4966; ISSN JASMAN
• Country of Publication: United States
• Language: English

Related Subjects

661300* -- Other Aspects of Physical Science-- (1992-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
ELECTRICITY
HYDROGEN COMPOUNDS
INTERFACES
MATHEMATICAL MODELS
OPTICAL PROPERTIES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PIEZOELECTRICITY
REFLECTION
REFLECTIVITY
ROUGHNESS
SOLIDS
SOUND WAVES
SURFACE PROPERTIES
TRANSDUCERS
WATER