Abstract: Apparatus for therapeutic application of vibro-acoustic energy to a human body, including a closed box with at least one sound opening in which is arranged a loudspeaker directed towards a part of the body. Upholstery is disposed between the box and the body at the location of the loudspeaker and has air passages. Low frequency signals are supplied to the loudspeaker and to one or a plurality of external loudspeakers. Music is supplied to the external loudspeakers. The low frequency signals are influenced either in step with the music, in a predetermined relation to the music, or in predetermined rhythm. As a storage medium for sound there may be used a tape cassette or compact disc in which at least one of the sound channels contains the influenced low frequency signal in the frequency range 30-120 Hz and the remaining sound channels contain pure music.