C. Abud, M. . Rodrigues, and T. Ramos, “Nonlinear Behavior of a Suspended Particle in Single-Axis Acoustic Levitators ”, Int J Innov Educ Res, vol. 7, no. 12, pp. 90–100, Dec. 2019, doi: 10.31686/ijier.vol7.iss12.2016.