Delineating space by making sound move around, through, under and above the body. New definitions of space, of perception, of hearing were examined. 1976 the SOUND CHAIR was developed: lying in the axis of a sound movement. The body itself turns into a swinging form . The sound space swings within the listening, acoustically perceived body. A new awareness of the body. SOUND CHAIR is an intense manifestation of the relationship between sound, space and body - which circumscribes the essence of any acoustic space.