Accession Number : ADA138491

Title :   Characterization and Scattering of Bounded Ultrasonic Beams.

Descriptive Note : Technical rept. 1 Jun 83-31 Jan 84,

Corporate Author : GEORGETOWN UNIV WASHINGTON DC DEPT OF PHYSICS

Personal Author(s) : Ngoc,T D K ; Mayer,W G ; Neighbors,T H , III

PDF Url : ADA138491

Report Date : 16 Feb 1984

Pagination or Media Count : 17

Abstract : The papers deal with some aspects of ultrasonic beam properties, their mathematical representation, and theoretical predictions related to reflection and scattering. The first paper deals with an acoustic-optic method by which the frequency contents of a pulsed ultrasonic signal can be determined without the introduction of a transducer probe whose presence in the path of the signal might alter the composition or shape of the pulse. The second paper is concerned with reflection of an ultrasonic signal at a boundary, particularly with the recently mentioned possibilities of the existence of backscattering. The third article deals with a method of describing mathematically a bounded beam which is known not to have a Gaussian cross section, and with the reflected profile of such a non-Gaussian beam.

Descriptors :   Ultrasonics, *Acoustooptics, Backscattering, Acoustic reflection, Mathematical models

Subject Categories : Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE