The installation has low frequency speakers that operates in a infrasound spectrum that is partly detectable by the human hearing. The speakers has a frequency between 10Hz -80Hz. They are attached to plastic sheets that creates sounds from the vibration of the speakers. The sculpture has two theremines. The antennas of the theremines detect when there is a intrusion in their emitted magnetic field. By manipulating this field you can control the vibration and intensity of the momvent in the sheets.The two sheets are built so that if only one of the sheets is vibrating the other shows a trace of that movement.