Abstract
Reflection 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..
Bhattacharyya, Tapan K. (1961). Seismic model investigations of energy partitioning in multilayered media. Doctoral dissertation, Texas A&M University. Texas A&M University. Libraries. Available electronically from
https : / /hdl .handle .net /1969 .1 /DISSERTATIONS -171478.