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MBARI’s new ear on the sounds of the ocean

A job working listening to marine animal sounds would have been cool. There’s nothing else quite like it.

Conservation & Science

Researchers at the Monterey Bay Aquarium Research Institute (MBARI) have learned a lot about Monterey Bay using robotic submersibles to look deep below the bay’s surface. Now they can listen to the bay as well, using an ultra-sensitive underwater microphone. Sounds recorded by this hydrophone have already provided surprising information, including evidence that beaked whales, though rarely seen, are common in the outer bay.

MBARI placed a deep-sea hydrophone on the seafloor using a remotely operated vehicle. The green cable carries power to the hydrophone and data back to shore. Photo courtesy MBARI MBARI placed a deep-sea hydrophone on the seafloor using a remotely operated vehicle. The green cable carries power to the hydrophone and data back to shore. Photo courtesy MBARI

In July 2015, MBARI researchers installed a broadband hydrophone on Smooth Ridge, about 30 kilometers (18 miles) from shore and 900 meters (3,000 feet) below the sea surface. Since that time, signals from the hydrophone have been relayed back to shore in real time, 24 hours a day, using MBARI’s cabled ocean observatory, the Monterey Accelerated Research…

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