complementary function is to be able to manipulate a single particle within a cluster without moving adjacent objects. to achieve this goal, the acoustic trap must be localized spacially. a first approach consists in using highly focused acoustic beams. since many particles of interest are attracted to the nodes of an acoustic field and thus expelled from the focus point, some specific wave structures combining strong focalization but with a minimum of the pressure amplitude at the focal point (surrounded by a ring of intensity to create the trap) are required to trap this type of particle. these specific conditions are met by bessel beams of topological order larger than zero, also called "acoustical vortices". with this kind of wave structures, the 2d and 3d selective manipulation of particles has been demonstrated with an array of transducers driven by programmable electronics. alternatively, another approach to localize the acoustic energy relies on the use of nanosecond-scale pulsed fields to generate localized acoustic standing waves. high frequency tweezers and holographic interdigitated transducers (idts) the individual selective manipulation of micro-objects requires to synthesize complex acoustic fields such as acoustic vortices (see previous section) at sufficiently high frequency to reach the necessary spatial resolution (typically the wavelength must be comparable to the size of the manipulated object to be selective). many holographic methods have been developed to synthesize complex wavefields including transducer arrays, 3d printed holograms, metamaterials or diffraction gratings. nevertheless, all these methods are limited to relatively low frequencies with an insufficient resolution to address micrometric particles, cells or microorganisms individually. on the other hand, interdigitated transducers (idts) were known as a reliable technique to synthesize acoustic wavefields up to ghz frequency.