As explained, ship traffic noise has doubled every decade since the 1960s, and it's wreaking havoc on marine life. Whales and dolphins are struggling to hear each other over the low-frequency din of boat traffic.

However, the most severe interruption of the ocean soundscape comes from "seismic surveying", an oil and gas exploration process that involves firing high-powered airguns in the water to map out the ocean floor.

This video was originally published at Vox news, and it was made in collaboration with Twenty Thousand Hertz, a podcast "that dives deep into all kinds of stories about sound."