Latest Sonar Stories

2010-07-08 07:33:00

SUNNYVALE, Calif., July 8 /PRNewswire/ -- Onda Corporation, the global leader in ultrasound measurements, celebrated the 2000th hydrophone shipment. The hallmark unit, a polymer-based HNP hydrophone, shipped to St. Jude's Medical where it is used to test the acoustic properties of their medical transducers in production. Ms. Adrienne (Cooper) Prasad, senior manufacturing engineer, comments, "We have used many Onda hydrophones over the years as part of a Production tester that helps us...

2010-06-22 09:50:00

Tracking fish across Alaska's vast continental shelves can present a challenge to any scientist studying Alaska's seas. Researchers at the University of Alaska Fairbanks have successfully tested a possible solution in the form of underwater gliders. Last month, Peter Winsor, associate professor of physical oceanography, and Andrew Seitz, assistant professor of fisheries, tested the use of autonomous underwater vehicles, called gliders, for tracking tagged fish. Winsor and Seitz suspended...

2010-06-09 07:30:00

GIVAT SHMUEL, Israel, June 9 /PRNewswire-FirstCall/ -- DSIT Solutions Ltd., a subsidiary of Acorn Energy Inc. (Nasdaq: ACFN), has announced today that it will officially introduce its new lightweight, compact, portable Diver Detection Sonar (DDS) system, the PointShield(TM) DDS at two exhibitions taking place in Europe and the United States this month. The first is the Underwater Defense Technology (UDT) Conference and Exhibition that is taking place June 8 - 10 in Hamburg, Germany and the...

2010-05-12 12:30:14

Scientists from the Naval Research Laboratory at Stennis Space Center, MS, (NRL-SSC) and Washington, D.C., recently completed an investigation of the acoustic properties of the deep seafloor in the Gulf of Mexico. Scientists on the cruise measured the effects of geologic faulting on the efficiency of acoustic wave propagation. "Knowing the bottom loss-the amount of sound energy lost with each bounce off the bottom-affects how far away one can 'see' a target in the ocean using sound," said...

2010-05-11 13:16:46

Bats' remarkable ability to "Ëœsee' in the dark uses the echoes from their own calls to decipher the shape of their dark surroundings. This process, known as echolocation, allows bats to perceive their surroundings in great detail, detecting insect prey or identifying threatening predators, and is a skill that engineers are hoping to replicate. A team of British researchers has worked with six adult Egyptian fruit bats from Tropical World in Leeds to record and recreate their...

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...

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...

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...

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...

Word of the Day
  • Scandinavian punch made of claret and aquavit with spices and raisins and orange peel and sugar.
This word comes from the Swedish 'glogg,' which is an alteration of 'glodgat,' mulled (wine).