hydrophones

The farthest I've put one in the water is 90 meters down, near Greenland, but I'm looking into the possibility of getting hydrophones to put on the bottom of the ocean with a wireless connection.

Raising the Sounds of (Near) Silence Andy Battaglia 2011

(Eurekalert.) "Using a system of underwater hydrophones that can record sounds from hundreds of miles away, a team of scientists from Oregon State University and the National Oceanic and Atmospheric Administration has documented the presence of endangered North Atlantic right whales in an area they were thought to be extinct."

Archive 2009-05-01 2009

(Eurekalert.) "Using a system of underwater hydrophones that can record sounds from hundreds of miles away, a team of scientists from Oregon State University and the National Oceanic and Atmospheric Administration has documented the presence of endangered North Atlantic right whales in an area they were thought to be extinct."

Technology Locates Unexpected Whales 2009

Boats have spent months cruising the river with binoculars and sonar equipment, and others have used hydrophones to pick up on the dolphin's calls, without success.

Scientists work hard to avoid declaring a species extinct 2011

Navy set up an array of underwater microphones, or hydrophones, around the globe to track Soviet submarines.

Tuning in to a deep sea monster : The Lovecraft News Network 2009

Tiny transmittersPOST has strategically placed over 450 hydrophones on the sea floor.

Fish 'Cell Phones' Track Marine Life 2010

On the hydrophones he had heard the rush of air escaping from something on the sea bottom, but he had heard no other sound.

In Spite of Their Declaration of Bombs 2010

A large vessel will tow anywhere from eight to 20 cables, each thousands of feet long and studded with hydrophones, which are microphones that float in the water.

BP disaster: Rare mix of geological factors created rich but dangerous reserves 2010

A large vessel will tow anywhere from eight to 20 cables, each thousands of feet long and studded with hydrophones, which are microphones that float in the water.

Rare mix of geological factors created rich but dangerous reserves 2010

Plus, we have a network of underground hydrophones (Google SOSUS) and other things to track (Google OSIS) shipping off our shores.

Matthew Yglesias » Russia and the Missile Shield 2007