“Ballonnenveld” by Martijn Tellinga. An installation that displays a sounding and vibrating body of helium-filled balloons. The balloons function as resonance-chambers for a trimmed spectrum of sine-waves that are fed through strings, connecting the balloons with double-coned carspeaker-elements. Each balloon holds its own resonance-frequency that changes over time as a result of varying temperature in the space, amount of helium in the balloon (decreasing over time) and length of the string.