Theoretical model of guided waves in a bone-mimicking plate coupled with soft-tissue layers

Quantitative ultrasound has shown a significant promise in the assessment of bone characteristics recent reports. However, our understanding wave interaction with tissues is still far from complete since propagation ultrasonic waves bones very challenging topic due to their multilayer nature. The aim current study develop theoretical model for guided bone-mimicking plate coupled two soft-tissue layers. Here, modeled as an isotropic solid layer while soft are fluid Based on boundary conditions set three-layered structure, characteristic equation obtained which results dispersion curves phase and group velocities. New expressions free propagating trilayered introduced. amplitudes modes generated by time-harmonic loads applied theoretically computed reciprocity consideration. As example calculation, normalized lowest presented. equations discussed this could be, general, useful further applications area quantitative ultrasound.