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dc.contributor.advisorRichardson, L. S.
dc.creatorBhattacharyya, Tapan K.
dc.date.accessioned2020-01-08T17:47:41Z
dc.date.available2020-01-08T17:47:41Z
dc.date.created1961
dc.date.issued1974
dc.identifier.urihttps://hdl.handle.net/1969.1/DISSERTATIONS-171478
dc.description.abstractReflection and transmission of ultrasonic waves were studied by two-dimensional models. Waves were generated by barium titanate disc transducers and were recorded with barium titanate benders. Five models were constructed. Model 1 consisted of two thick media bounded by a plane interface. Model 2 consisted of a single thin high velocity layer between two identical low velocity sheets. Model 3 consisted of three thin layers, in which a high velocity layer was sandwiched between two identical low velocity layers. These three layers were bounded by two sheets of intermediate velocity. Model 4 was similar to Model 3, except that the center layer was of low velocity and the outer two were of high velocity. Model 5 consisted of six alternating high and low velocity layers between two intermediate velocity sheets. Models 1 and 2 were used as standards of comparison for studies on multilayered media. In Model 1 the reflection and transmission coefficients were measured as functions of emergence angle and compared with amplitudes calculated from plane wave reflection and transmission theory. In Model 2 the waves reflected from and transmitted across the single layer were recorded for different source-receiver distances and source frequencies of 200, 75 and 20 kc (Kilocycles per second). In the multilayered models, the reflected and transmitted events were recorded with varying acoustic impedance contrasts, angles of emergence and source frequencies of 200, 150, 100, 75, 50, and 20 kc..en
dc.format.extent115 leaves : illustrationsen
dc.format.mediumelectronicen
dc.format.mimetypeapplication/pdf
dc.language.isoeng
dc.rightsThis thesis was part of a retrospective digitization project authorized by the Texas A&M University Libraries. Copyright remains vested with the author(s). It is the user's responsibility to secure permission from the copyright holder(s) for re-use of the work beyond the provision of Fair Use.en
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.subject.classification1961 Disser-tation B575
dc.titleSeismic model investigations of energy partitioning in multilayered mediaen
dc.typeThesisen
thesis.degree.grantorTexas A&M Universityen
thesis.degree.nameDoctor of Philosophyen
thesis.degree.levelDoctoralen
dc.contributor.committeeMemberCleveland, R.
dc.contributor.committeeMemberHolt, O. M.
dc.contributor.committeeMemberHope, L.
dc.contributor.committeeMemberKerley, S. A.
dc.contributor.committeeMemberNelson, B.
dc.type.genredissertationsen
dc.type.materialtexten
dc.format.digitalOriginreformatted digitalen
dc.publisher.digitalTexas A&M University. Libraries


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