Seven-year hydrophone record maps Arctic sounds 500 meters below ice(opens in a new tab)
A hydrophone 500 m beneath the Beaufort Sea has recorded underwater sounds for seven years, creating a rare long‑term acoustic reference for the Arctic. Researchers say the recordings reveal seasonal noise from ice and waves, while cataloguing human‑made sounds from seismic surveys, offering a baseline to discern unusual events such as earthquakes or ship traffic.
