Abstract: The invention relates to the method and devices of sound volume management and control in the attended areas. According to the proposed method and system variants the sound reproducing system comprises: sounding mode appointment device, central station for audio signal transmittance; one or more peripheral stations for audio signal reception and playback; appliance for listener's location recognition; computing device for performing calculation concerning sounding parameters at the points of each listener's location and for performing calculation of controlling parameters for system tuning. The system can be operated wirelessly and can compose a local network.

Abstract: Proposed device relates to sound playback. Playback device is made in the shape of a polyhedron and is equipped with preferably gravity-controlled switch for operation modes and reception of input signals selection. The channel assigned is directly linked to the side the unit stands on as a base. When placed on front or back sides, the unit is turned off.