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The Dolphin Institute - Whale Research
(Helweg, Herman, Yamamoto & Forestell, 1990). Spacing of singers in the winter grounds. Using a three-hydrophone array to localize the source of underwater sounds, we studied the movements and spacing of singing humpback whales off the Big Island of Hawaii (Frankel, Clark, Herman & Gabriele, 1995).Singers were separated from one another by ...
www.dolphin-institute.org

Ocean Alliance - WHALE GALLERY
Johnson December 22, 2000 How We Find and Track Sperm Whales To find and track sperm whales we use a hydrophone array (two underwater microphones housed in a 30 foot, oil-filled tube and towed behind the ship from a 100 meter-long cable). Alone, this acoustic array gives us very good stereo sound from the sea surrounding the boat. Many sounds, like the clicks of sperm whales ...
www.oceanalliance.org

Ocean Alliance - VOYAGE OF THE ODYSSEY
Bob heard a series of sperm whale 'codas' on the acoustic hydrophone array. Codas are repeated patterns of clicks thought to be social vocalizations used by sperm whales as ... The Sounds of Night In the pilot house, Roger Payne listens for sperm whales using the acoustic array, an underwater microphone towed behind the Odyssey. Read more >> Listen to the Odyssey log: Real Audio - ...
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Advanced technologies in development for the Eagle Ray include installation of a phase-preserving sub-bottom profiler, a towed hydrophone array for geophysical surveys, and the installation of prototype sensors to allow the vehicle to survey the water column for biogeochemical parameters of interest, such as methane gas. The Eagle Ray was acquired in 2006 by ...
www.nurp.noaa.gov

Orca Network - Sightings Archives - August 2006
Lime Kiln, and as I was driving home, I was listening to 88.1 FM to the hydrophone array at Lime Kiln. Lots of vocalizations and echolocation clicks could be clearly heard! Whales were spread out ... lots of salmon swimming by! As we watched K20 Spock and her youngster swim by, we dropped the hydrophone in just in time to hear some incredibly clear and LOUD vocalizations. Sounded just like kittens to ...
orcanetwork.org

Orca Network - Sightings Archives - July 2007
Listening to the Orcasound hydrophone, I picked up faint whistles of K-Pod this morning around 10:00. They got louder and louder ... and high arch diving. A large container ship was in the immediate area, and we were towing the hydrophone array, so our first pass through the group was done at half speed, with little alteration from base ...
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Ship Operations: Acoustics Monitoring Program
UPDATES September 2003 - Matt Fowler will be servicing the northern north Atlantic hydrophone array for the first time. Mooring operations will be done on the British ship RRS ... of twelve hydrophones. February 2002: Robert Dziak and Matt Fowler serviced the Central North Atlantic array from the University of Rhode Island's R/V Endeavor. Two of the six hydrophones ...
www.pmel.noaa.gov

Acoustics Monitoring Program: Mid-Atlantic Ridge Seismicity
The configuration of the hydrophone array will allow epicenters from at least 10N to 40N to be located with sufficient accuracy to be associated with specific structures on the seafloor (error estimation is < 2 km within the array), with seismicity from the broader Atlantic region located at reduced accuracy. UPDATE: After three years of ...
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The Pelagic Shark Research Foundation - In the News
Tagged sharks were tracked for an hour or two a day using a hydrophone, an underwater microphone, hung over the side of a boat. In 1997 Klimley and Le Boeuf replaced the handheld ... a global map. To test this theory, Klimley and Le Boeuf would like to set up a large array of solar-powered buoys along the 70 miles from Ano Nuevo to the Farallons to Point Reyes. And ...
www.pelagic.org

NGDC/MGG-Announcements: MULTICHANNEL SEISMIC-REFLECTION PROFILES
NGDC for public dissemination. The seismic source consisted of a tuned five-airgun array totaling 1,311 cu.in. pressurized to 1,900 psi, towed at a depth of 10.5 m. The receiver consisted of a 24-channel hydrophone streamer, with 100-m group lengths containing 60 hydrophones in each group. The streamer was towed at a depth of 12.5 m. The data were ...
www.ngdc.noaa.gov