Whales can’t hear each other in the noisy ocean. This inventor has a solution 200 years in the making.

When most people think of noise pollution, the image conjured up is one of concrete buildings and crowded streets bursting with beeping car horns and screeching industrial tools. But there’s another flavor of noise pollution happening underwater, across the world’s oceans, and it’s taking an even worse toll on its inhabitants. The constant hum from human-made inventions (think massive shipping boats, deep-sea mining, and offshore oil rigs) has radically transformed the sou