This project investigates underwater sound pollution in the Arctic and its architectural translation into an urban context. As warming temperatures open previously ice-blocked passages, increased cargo shipping introduces low-frequency noise that disrupts the acoustic environments essential to narwhals and beluga whales. The project begins with a network of floating Outposts deployed near Baffin Island, each equipped with hydrophones and environmental sensors to record underwater soundscapes across depth, current, and seasonal conditions. These Outposts are supported by a coastal Research Hub that functions as an analytical and listening center. The second phase translates these Arctic recordings into an urban architectural archive located at the Port of Québec. Organized as a vertical acoustic theater, the building merges archive and performance, allowing urban noise and Arctic soundscapes to intersect through section. Through circulation, voids, and controlled listening rooms, the architecture renders sound legible as a spatial and environmental condition.