Optomechanics investigates the interactions between light and mechanical degrees of freedom. Emerged ithe mid-1990’s, the field distinguishes by the extreme motion sensitivity, down to the zeptometre rangeyielded by a large panel of ultra-sensitive optical readout methods. This internship proposes to extend this paradigm by combining the precise control of light with the complementary control offered by acoustic waves. While optics provides exquisite sensitivity at small scales and high frequencies, acoustic trapping allows manipulation of particles at micrometric scales and lower frequencies, enabling complementary access to spatial and temporal dynamics. By integrating an acoustic levitation system with an ultra-sensitive optomechanical detection scheme, this approach will enhance measurement sensitivity and provide new opportunities to simultaneously control and monitor multiple particles in the trap. The project will focus on the characterisation and the control of the acoustic field to optimize the trapping and coupling of the levitated particles. Its main goals will be to optimize the measurement sensitivity of the optomechanical systems scheme, as well as gaining control of collective particle motion. This work will serve as a foundation for future advanced optomechanics experiments and the development of low-noise experimental platforms.