Gravitational Vibrations is a sound sculpture, made for the exhibition “The Overheard”. It was placed in a small pond inside the old chalk-mine Mønsted Kalkgruber from May until November 2017.
Listen to a recording of the sculpture here:
The sculpture consists of a 6m tall steel frame with 8 piano strings attached, spanned by large boulders. The piano strings each have a pitch that is determined by their length and the weight of the boulder.
Inside the sculpture, is a set of electromagnetic coils which when activated, causes the strings to oscillate, creating long drone-like sounds. Another system of servo motors can strike the strings with a more percussive effect. These two systems are the basis of the composition, but the sound itself will be shaped by the acoustic amplification of the resonant frame and the unique acoustics inside Mønsted Kalkgruber.
The appearance and sound of the sculpture will change over time - the steel will oxidize and boulders will grow algae and the like from its surroundings. The sound will also change over time as the composition is based on a preprogrammed generative system that is manipulated and deconstructed with data from various sensors installed in the sculpture.
"Gravitational Vibrations" is based on a instrument I created for another exhibition: "The Chameleon Room". Read more here