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Latest Sonar Stories

2011-09-14 11:32:47

A new study reveals that the way fruit bats use biosonar to 'see' their surroundings is significantly more advanced than first thought. The study, published September 13 in the online, open access journal PLoS Biology, examines Egyptian fruit bats (Rousettus aegyptiacus), which use echolocation to orient inside their caves and to find fruit hidden in the branches of trees. Their high-frequency clicks form a sonar beam that spreads across a fan-shaped area, and the returning echoes allow them...

Image 1 - WHOI Studies Hydrocarbon Flow Rate Of Deepwater Horizon Spill
2011-09-06 05:23:09

  Researchers at the Woods Hole Oceanographic Institution (WHOI) have calculated the flow rate of the BP Macondo well to be about 57,000 barrels of oil per day, totaling close to 5 million barrels of oil and nearly 100 million standard cubic feet per day of natural gas released from April 2010 to July 2010. The study results were published in the online issue of the Proceedings Of The National Academy Of Sciences (PNAS). The estimates matched those made by the federal government...

2011-08-15 08:00:00

TEWKSBURY, Mass., Aug. 15, 2011 /PRNewswire/ -- The U.S. Navy announced the successful launch and recovery of the Remote Multi-Mission Vehicle (RMMV) carrying the Raytheon-developed AN/AQS-20A minehunting sonar. The launch and recovery was the first demonstration of the unmanned, remotely-operated RMMV deployed from the USS Independence (LCS 2) while underway. AN/AQS-20A is a critical element of the U.S. Navy's mine countermeasure capability and the only minehunting sonar sensor developed,...

2011-08-05 07:30:00

GIVAT SHMUEL, Israel, Aug. 5, 2011 /PRNewswire/ -- DSIT Solutions Ltd., a subsidiary of Acorn Energy Inc. (NASDAQ: ACFN), announced that its Projects Division was awarded a new manufacturing and simulator development contract valued at approximately $1.75 million. The customer is a leading integrator with whom DSIT enjoys a long and mutually beneficial business relationship. Work on the project has already begun and is expected to be completed in the middle of 2012. The customer has...

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2011-07-31 07:15:59

In a paper published recently in the journal Science, researchers at Brown University and from the Republic of Georgia have learned how bats can home in on a target, virtually dismissing other objects in their midst. The trick lies in their neurons: Bats can separate a cavalcade of echoes returning from their sonar blasts by distinguishing changes in amplitude "” the intensity of the sound "” between different parts of each echo within 1.5 decibels, to decide whether the object is...

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2011-07-29 14:11:15

Scientists have found a rainforest vine that has evolved dish-shaped leaves to attract the bats that pollinate it. Tests found that the leaves were supremely efficient at bouncing back the sound pulses the flying mammals used to navigate. The bats were found to be able to locate the plant when the leaves were present twice as quickly as when they were removed. This study is the first to find a plant with "specialized acoustic features" to help bat pollinators find them using sound. Bats...

2011-07-28 23:19:02

The researchers discovered that a rainforest vine, pollinated by bats, has evolved dish-shaped leaves with such conspicuous echoes that nectar-feeding bats can find its flowers twice as fast by echolocation. The study is published today in Science. While it is well known that the bright colours of flowers serve to attract visually-guided pollinators such as bees and birds, little research has been done to see whether plants which rely on echolocating bats for pollination and seed dispersal...


Word of the Day
lunula
  • A small crescent-shaped structure or marking, especially the white area at the base of a fingernail that resembles a half-moon.
This word is a diminutive of the Latin 'luna,' moon.
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