Navigation Links
Laughing hyenas, wailing levees, the sound of cheese and blaring bagpipes
Date:4/24/2009

he U.S. Naval Research Laboratory in Washington, DC, are working on ways to use flashes of laser light instead. These lasers travel through air and water to generate an underwater explosion of sound at a remote location without the need for extra hardware. They will present their latest experimental data testing laser acoustics in a bubbly salt water tank and comparing two types of lasers.

The conversion of light into sound is possible because certain kinds of light pulses will self-compress, superheating a small volume of water. This optical compression happens because the intense laser light changes the properties of water so that it acts like a focusing lens and because slightly different colors of the laser travel at different speeds in water. The resulting explosion of steam it creates can generate a 210 decibel pulse of sound.

Currently, Jones is tailoring two different kinds of visible and infrared lasers to produce these pulses, which could eventually be used to encode information. The NRL group has created broadband laser pulses that can travel up to 20 meters through water to create acoustic pulses at precise distances. The laser light can also travel hundreds of meters through clear air, so one potential application is airplane-to-submarine communication. Acoustic reflections from the pings they produce could also be monitored to gather information about underwater environments, from detecting mines to mapping the bottom of the ocean floor.

The talk "Intense underwater laser acoustic source for Navy applications" (2aEA-7) by Ted Jones is at 10:30 a.m. on Tuesday, May 19. Abstract: http://asa.aip.org/web2/asa/abstracts/search.may09/asa333.html


12) ICELANDIC SAGA: RETURN OF THE RIGHT WHALE

The North Atlantic right whale, with only about 300-350 animals known to exist, used to inhabit the Cape Farewell Ground, which
'/>"/>

Contact: Jason Bardi
jbardi@aip.org
301-209-3091
American Institute of Physics
Source:Eurekalert

Page: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

Related biology news :

1. Nitrous oxide: definitely no laughing matter
2. 1 person out of every 1,000 has synaesthesia, in which an individual can smell a sound
3. The art of using science to inform ecosystem restoration in Puget Sound
4. Deep-sea sharks wired for sound
5. New 3-D ultrasound could improve stroke diagnosis, care
6. Sounding out heart problems automatically
7. If a street tree falls... what does it take to make sound policy?
8. Anti-tumor therapy with endoscopic ultrasound may fight cancer more safely and effectively
9. Bats pick up rustling sounds against highway background noise
10. Alternative to burning: environmentally sound disposal for wood chips
11. Effects of anthropogenic sound on marine mammals -- a research strategy
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:9/16/2014)... YORK (17 September, 2014)More than $100 trillion in ... of annual carbon dioxide (CO2)a 40 percent reduction ... 2050 if the world expands public transportation, walking ... report released by the University of California, Davis, ... (ITDP). , Further, an estimated 1.4 million ...
(Date:9/16/2014)... its own bacterial identity. That,s the conclusion of University ... studied the genetic fingerprints of bacteria on 57 species ... study demonstrates for the first time that host plants ... possess very different microbial communities on their leaves," said ... in the UO,s Institute of Ecology and Evolution who ...
(Date:9/16/2014)... the Keystone XL pipeline (KXL) would likely increase oil ... researchers surveyed by the non-profit organization Near Zero. The ... Climate Impact," and includes both supporters and opponents of ... oil sands could lead to significantly higher greenhouse gas ... markets respond. , "This report examines three main ...
Breaking Biology News(10 mins):Global shift away from cars saves US$100 trillion, eliminates 1,700 MT of CO2 pollution 2Global shift away from cars saves US$100 trillion, eliminates 1,700 MT of CO2 pollution 3Global shift away from cars saves US$100 trillion, eliminates 1,700 MT of CO2 pollution 4Global shift away from cars saves US$100 trillion, eliminates 1,700 MT of CO2 pollution 5Microbiome research shows each tree species has a unique bacterial identity 2Keystone XL would likely raise oil sands production and greenhouse gas emissions 2
... For the first time in nearly a century drinkers will ... heritage barley from the Victorian period. Old varieties ... the John Innes Centre revived Chevallier from the institute,s Genetic ... records indicate that the variety produced premium quality malt and ...
... analysis, carbon dioxide removal could be used under certain ... but it would not replace the bulk of actual ... allows to separate emissions control from the time and ... important for climate protection," says lead-author Elmar Kriegler. "You ...
... "Many of the great whales which once populated the oceans ... commercial hunting. The committee also worried about how tuna fishing ... And they considered reports about seal hunting and the decline ... October of that year, Congress passed the Marine Mammal Protection ...
Cached Biology News:Cheers to better beer and disease resistance 2CO2 removal can lower costs of climate protection 2CO2 removal can lower costs of climate protection 3Sea mammals find US safe harbor 2Sea mammals find US safe harbor 3Sea mammals find US safe harbor 4
(Date:9/16/2014)... , Sept. 16, 2014  The Council ... entrepreneurial support organization in the country, today released ... Report . It showed that ... North Carolina startups in the technology, ... more global investment from a variety of sources. Significant ...
(Date:9/16/2014)... Sept. 16, 2014 /PRNewswire-iReach/ -- Researchers found that ... identifies patients with bone fragility fracture when today,s ... people worldwide are at risk of fracture for ... bone strength test, the DEXA bone density scan. ... for Bone and Mineral Research Annual Conference (ASBMR) ...
(Date:9/16/2014)... RENU 28, the world's first and only skin gel ... in Australia and New Zealand in mid-August . , The ... tour will make stops in Brisbane on September 16, the ... on the 20th, and Melbourne on the 22nd. , Helping ... to educate people about the new product and business opportunity ...
(Date:9/15/2014)... JOSE, Calif. , Sept. 15, 2014 /PRNewswire/ ... Proposals (RFP) for flexible, printed product demonstrators (demos) ... a two-stage RFP process with pre-proposals due on ... January 2015.  Funds for proposals ultimately selected are ... and have a significant cost share by the ...
Breaking Biology Technology:CED's Mid-Year Update to its Innovators Report Shows NC Startups Attracting Investment From Across the Globe with Several High-Profile Investment Deals, IPOs and Acquisitions Signaling Strength of Entrepreneurial Sector 2CED's Mid-Year Update to its Innovators Report Shows NC Startups Attracting Investment From Across the Globe with Several High-Profile Investment Deals, IPOs and Acquisitions Signaling Strength of Entrepreneurial Sector 3CED's Mid-Year Update to its Innovators Report Shows NC Startups Attracting Investment From Across the Globe with Several High-Profile Investment Deals, IPOs and Acquisitions Signaling Strength of Entrepreneurial Sector 4ActiveLife's BMSi Test Provides Hope for 160 Million with Undetectable Risk of Bone Fracture 2ActiveLife's BMSi Test Provides Hope for 160 Million with Undetectable Risk of Bone Fracture 3Global Wellness Company Hosts ASEA Australia Tour September 16-22 2FlexTech Alliance Issues 2015 Request for Proposals in Flexible, Printed Electronics 2
... , NOVATO, Calif., Sept. 8 BioMarin Pharmaceutical Inc. ... Officer of BioMarin, will present a company update at the Morgan Stanley ... 1:35 p.m. ET. , , Interested parties ... investor section of the BioMarin website, www.BMRN.com . ...
... , SAN DIEGO, Sept. 8 eBioscience Corporation, a ... the acquisition of NatuTec GmbH, a leading distributor of high-quality biological ... , "For the past 10 years, NatuTec has ... R. Nelson, CEO of eBioscience. "The NatuTec acquisition provides eBioscience ...
... LAIYANG, China, Sept. 8 /PRNewswire-Asia-FirstCall/ -- ... a,U.S. pharmaceutical company with its principal operations in the ... for,fiscal year 2009. The Company expects to meet ... revenue and operating income of $40 to $43 million ...
Cached Biology Technology:BioMarin to Present at the Morgan Stanley Healthcare Conference 2eBioscience Corporation Acquires NatuTec GmbH 2Jiangbo Pharmaceuticals Reaffirms Guidance for Fiscal 2009 2
Affinity Purified Rabbit Anti-mouse sRANKL Biotinylated Polyclonal Antibody...
Polyclonal antiserum raised against conjugated L-isoleucine. Available as antiserum. Amino Acid Antibodies...
... in heart tissues, and is produced ... conditions. Treatment of cells with ... TIMP-4 in some cell types, but ... require concentration of cell culture media ...
Mouse monoclonal [002-49] to C1s ( Abpromise for all tested applications). entrezGeneID: 716 SwissProtID: P09871...
Biology Products: