<p>The axisymmetric oscillation dynamics of droplets were investigated using an integrated numerical and experimental approach. Numerically, high-resolution simulations based on the arbitrary Lagrangian–Eulerian (ALE) method were carried out under ideal conditions that neglected gravity and acoustic fields. This simplified model served as a supplementary tool to analyze the influence of initial deformation amplitude, droplet size, and viscous dissipation on frequency shifts. Experimentally, droplet oscillations were analyzed using an acoustic levitation platform integrated with a high-speed imaging system, with particular attention to three governing parameters affecting frequency shifts: droplet size, oscillation amplitude, and static aspect ratio. Comparative analysis revealed that smaller ideal droplets exhibit less negative frequency shifts during large-amplitude oscillations, whereas acoustically levitated droplets of smaller size exhibit greater negative frequency shifts as a result of acoustic radiation forces.</p>