These two installations involved suspending a large block of ice over a curved sheet of stainless steel. Embedded in the ice were layers of stones which, as the ice melted, fell and struck the metal sheet.
The sheet had contact microphones attached to it, which amplified the sound of the impacts through speakers attached to the scaffolding.
The first installation took place at the Oxford Bodleian Library in 2005.
The second installation took place at The Eden Project, Cornwall, in 2008.