Meteorological aspects of Doppler-free acoustic sounding of the atmosphere are considered. Numerous intercomparisons of acoustic radars (sodars) records with direct measurements with meteorological sensors in ABL are analyzed in detail. Summary is given of the results of sodar sensing use for air pollution monitoring, studying regional atmospheric fluxes, as well as mesoscale peculiarities in the horizontal thermal structure of the boundary layer (connected with heat islands over cities and others factors). Possibilities are discussed of using sodar records for the mixing layer height estimation, atmospheric fronts detection, etc. Much attention is paid to the works of Russian scientists.