In Place of a Hollow Tree

OverView :Migrating from the Amazon basin across northern Illinois, a flock of chimney swifts flutter without perching, using a natural form of radar to navigate. The pulse of infrasound from deep ocean waves vibrates the ground and emanates up, guiding the birds amid disrupted air. Open space heard becomes turbulent, resonant space. Various forms of tuning elicit a strained acoustic ecology between altitudes.