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Latest Sonar Stories

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2011-01-06 11:17:25

Liz Ahlberg, Physical Sciences Editor, University of Illinois In one University of Illinois lab, invisibility is a matter of now you hear it, now you don't. Led by mechanical science and engineering professor Nicholas Fang, Illinois researchers have demonstrated an acoustic cloak, a technology that renders underwater objects invisible to sonar and other ultrasound waves. "We are not talking about science fiction. We are talking about controlling sound waves by bending and twisting them in a...

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2010-11-18 09:05:13

Scientists at the University of Southampton have developed a new kind of underwater sonar device that can detect objects through bubble clouds that would effectively blind standard sonar. Just as ultrasound is used in medical imaging, conventional sonar "Ëœsees' with sound. It uses differences between emitted sound pulses and their echoes to detect and identify targets. These include submerged structures such as reefs and wrecks, and objects, including submarines and fish shoals....

2010-11-16 07:47:08

(Ivanhoe Newswire) --Tired of the old pick up line "In a room full of people all I hear is you?"  Well, research reveals that may be true. A study found that brains of bats tell some neurons to 'shush' and others to 'yell louder' in order for key sounds to be heard above background noise"”a process that may be working in humans as well. "Some neurons seemed to know to yell louder to report communication sounds over the presence of background noise," Bridget Queenan, a doctoral...

2010-11-15 13:54:56

GUMC neuroscientists find brains of bats tell some neurons to 'shush' and others to 'yell louder' in order for key sounds to be heard above background noise How do you know what to listen to? In the middle of a noisy party, how does a mother suddenly focus on a child's cry, even if it isn't her own? Bridget Queenan, a doctoral candidate in neuroscience at Georgetown University Medical Center is turning to mustached bats to help her solve this puzzle. At the annual meeting of the Society for...

2010-11-04 07:15:00

SUNNYVALE, Calif., Nov. 4, 2010 /PRNewswire/ -- Onda Corporation, the global leader in ultrasound measurement solutions for medical and industrial markets, introduced the latest additions to the hydrophone product family at the IEEE Ultrasonics Symposium in San Diego. The HFO-660 is a new fiber optic hydrophone system that can measure acoustic pressures up to 500 MPa for emerging applications of HITU. It is complemented with the release of the latest generation acoustic scanning system,...

2010-10-07 08:00:00

TEWKSBURY, Mass., Oct. 7, 2010 /PRNewswire/ -- Raytheon Company (NYSE: RTN) received a $14.6 million U.S. Navy contract to produce and deliver AN/ASQ-235 Airborne Mine Neutralization Systems. AMNS, an essential component of the Navy's organic mine countermeasures family of systems, is deployed by the MH-60S multimission helicopter to locate and destroy underwater mines previously detected by Raytheon's AN/AQS-20A minehunting sonar system. Both AMNS and AN/AQS-20A provide critical...

2010-09-22 08:35:00

GIVAT SHMUEL, Israel, Sept. 22 /PRNewswire/ -- DSIT Solutions Ltd., a subsidiary of Acorn Energy, Inc. (Nasdaq: ACFN), announced today that it has received orders from an Asian country for its underwater sonar systems. The combined value of the contracts is more than $6 million. Dan Ben-Dov, VP Sales & Marketing said, "This is the second order of this magnitude that we have received over the past few months, as we continue to grow our leading position in the worldwide market for...

2010-09-01 20:25:44

Speakers made from carbon nanotube sheets that are a fraction of the width of a human hair can both generate sound and cancel out noise -- properties ideal for submarine sonar to probe the ocean depths and make subs invisible to enemies. That's the topic of a report on these "nanotube speakers," which appears in ACS' Nano Letters, a monthly journal. Ali Aliev and colleagues explain that thin films of nanotubes can generate sound waves via a thermoacoustic effect. Every time that an electrical...

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...

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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...


Word of the Day
reremouse
  • A bat.
The word 'reremouse' comes from Middle English reremous, from Old English hrēremūs, hrērmūs ("bat"), equivalent to rear (“to move, shake, stir”) +‎ mouse.
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