Systems and methods for audio communication are disclosed. The system includes a plurality of transducer units and plurality of three dimensional sensor modules (TDSMs) adapted to be located in a plurality of sites/spaces to which service should be provided by the system. The plurality of transducer units are capable of emitting/directing and focusing ultra-sonic signals to respective coverage zones in the sites, such that localized (confined) sound field can be formed at selected spatial position in the coverage zones by utilizing sound from ultrasound technique. The TDSMs are associated withrespective sensing volumes in the sites and are operable to obtain sensory data indicative of the 3D arrangement of elements in a within the sites. The system includes: (i) user detection module forprocessing the sensory data from the TDSMs to determine spatial location of a user within the sensing volumes; (ii) a mapping module providing spatial mapping between the sensing volumes and the coverage zones; and (iii) output sound generator adapted to utilize the spatial mapping to selecting a transducer unit for serving the user, and operating the selected transducer to produce the localized sound field in close vicinity to the user's head/ear(s).