The concept of sound as a marker of territory is central Sarah van Sonsbeeck's practice, taking silence (which she calls ‘anti-sound’) as a building block of private space. Through her practice, she makes apparent how our private world is encroached upon by the outside space, resulting in claustrophobic, negative experiences. Furthermore, Sarah Van Sonsbeeck underlines the importance of privacy and silence as a refuge from these disruptive outside stresses. The series of spy mirrors function both as artwork and as a means of controlling the surrounding space. Though beware, once you gaze into them you will become part of the Security Space they entail.