A standing wave acoustic levitation system for large planar objects

摘要: An acoustic levitation system is presented which can levitate planar objects that are much larger than the wavelength of applied wave. It uses standing wave field formed by sound radiator and levitated object. experimental setup developed, a compact disc successfully at frequency 19 kHz input power 40 W. The modeled according to theory. mean excess pressure experienced object calculated compared with experiment results. influences nonlinear effects within near-field discussed. Nonlinear absorption coefficient introduced into linear model give more precise description system. force for different distances driving frequencies. calculation results show acceptable agreement measurement