The sound art of Jacob Kirkegaard explores ways of reflecting on complex, unnoticed or unapproachable conditions and environments. His works have treated themes such as radioactivity in Chernobyl and Fukushima, melting ice in the Arctic and border walls in Palestine. His two recent works are immersive acoustic explorations into global waste management and of processes generally unfolding when a human being dies. Since 2006 Kirkegaard has been extensively researching, recording and creating works using otoacoustic emissions; tones generated from the human inner ear. The core element and method of his work derive from the use of sound recordings of the tangible aspects of intangible themes.