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Latest Sonar Stories

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2010-04-01 13:17:19

Researchers at Woods Hole Oceanographic Institution (WHOI) have developed two advanced broadband acoustic systems that they believe could represent the acoustic equivalent of the leap from black-and-white television to high-definition color TV. For oceanographers, this could mean a major upgrade in their ability to count and classify fish and to pinpoint tiny zooplankton amid seas of turbulence. Lead authors Tim Stanton and Andone Lavery in the Department of Applied Ocean Physics and...

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2010-03-30 06:35:00

For years, Brown University neuroscientist James Simmons has filmed bats as they flew in packs or individually chased prey in thick foliage. All the while, he asked himself why the bats never collided with objects in their paths or with each other. "You wonder, how do they do it?" he said. After a series of innovative experiments designed to mimic a thick forest, Simmons and colleagues at Brown and in Japan have discovered how bats are so adept at avoiding objects, real or perceived. In a...

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2010-02-24 13:00:00

In a technological advance that its developers are likening to the cell phone and wireless Internet access, Woods Hole Oceanographic Institution (WHOI) scientists and engineers have devised an undersea optical communications system that"”complemented by acoustics"”enables a virtual revolution in high-speed undersea data collection and transmission. Along with the "transfer [of] real-time video from un-tethered [submerged] vehicles" up to support vessels on the surface, "this...

2010-02-05 13:50:14

The best way to track a moving object with a flashlight might be to aim it to one side, catching the object in the edge of the beam rather than the center. New research at the Weizmann Institute of Science reveals that bats, which "Ëœsee' with beams of sound waves, skew their beams off-center when they want to locate an object. The research, which recently appeared in Science, shows that this strategy is the most efficient for locating objects. Dr. Nachum Ulanovsky and...

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2010-02-05 09:45:00

New research conducted at the University of Maryland's bat lab shows Egyptian fruit bats find a target by NOT aiming their guiding sonar directly at it. Instead, they alternately point the sound beam to either side of the target. The new findings by researchers from Maryland and the Weizmann Institute of Science in Israel suggest that this strategy optimizes the bats' ability to pinpoint the location of a target, but also makes it harder for them to detect a target in the first place. "We...

2010-02-04 09:55:00

GIVAT SHMUEL, Israel, Feb. 4 /PRNewswire-FirstCall/ -- DSIT Solutions Ltd., a subsidiary of Acorn Energy, Inc. (Nasdaq: ACFN), has been awarded a contract to supply its AquaShield(TM) Diver Detection Sonar (DDS) systems for the protection of several coastal and offshore installations. The contract value is just over US $4,400,000. The AquaShield(TM) underwater security systems are intended for permanent installation to provide superior underwater intruder detection. The AquaShield(TM)...

2010-01-28 09:32:00

TULSA, Okla., Jan. 28 /PRNewswire/ -- Lowrance, a world-leading brand in marine electronics since 1957 and GPS navigational systems since 1992, re-affirmed today that the LSS-1 StructureScan(TM) sonar imaging module option - compatible with HDS fishfinder/chartplotter multifunction displays - will continue to be sold, distributed and fully supported worldwide. The announcement is a direct response to today's patent infringement lawsuit filed against Navico, Inc., by Johnson Outdoors....

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2010-01-25 13:25:00

Only some bats and toothed whales rely on sophisticated echolocation, in which they emit sonar pulses and process returning echoes, to detect and track down small prey. Now, two new studies in the January 26th issue of Current Biology, a Cell Press publication, show that bats' and whales' remarkable ability and the high-frequency hearing it depends on are shared at a much deeper level than anyone would have anticipated"”all the way down to the molecular level. The discovery represents...

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2010-01-25 07:25:00

3-D imaging differentiates how various bats generate biosonar signals Researchers at The University of Western Ontario (Western) led an international and multi-disciplinary study that sheds new light on the way that bats echolocate. With echolocation, animals emit sounds and then listen to the reflected echoes of those sounds to form images of their surroundings in their brains. The team used state-of-the-art micro-computed tomography systems at the Robarts Research Institute in London,...

2010-01-20 04:00:00

SearchforAmelia.org Showcases State-of-the-Art Technology Used to Look for Amelia Earhart SAN DIEGO, Jan. 20 /PRNewswire-USNewswire/ -- The Waitt Institute for Discovery (http://wid.waittinstitute.org), a non-profit research organization established by Ted Waitt, founder and former Chairman of Gateway, Inc., has launched its new Search for Amelia Web site (http://searchforamelia.org). Created to publish the full results from the Institute's 2009 search for Amelia Earhart's Lockheed...


Word of the Day
cruet
  • A vial or small glass bottle, especially one for holding vinegar, oil, etc.; a caster for liquids.
This word is Middle English in origin, and ultimately comes from the Old French, diminutive of 'crue,' flask.
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