Control and monitoring of dynamic collapse event in cMUTs arrays for therapeutic applications

In this paper, the displacement behavior of the cMUT is analyzed thanks to a time domain model. The nonlinear components in the response spectrum with different excitation parameters are compared. A method based on the addition of a series impedance to the cMUT, which permits to decrease the harmonic components and enhance the maximum displacement swept by the diaphragm, is applied in a therapeutic context. The benefits of such a method are pointed out and discussed. After that, experimental measurements are performed to confirm these advantages, and discussed.