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:3/23/2015)... , March 23, 2015   HOYOS Labs ... management company, today announced that the Company will demonstrate ... both enterprise and consumers at Connect:ID on March 23 ... HOYOS Labs will highlight the IEEE Biometric Open ... ; and enterprise access control system. BOPS was ...
(Date:3/20/2015)... 20, 2015 NXT-ID, Inc. (NASDAQ: NXTD ... focused on the growing mobile commerce market, announces its ... of the products featured in 2015 "I Want That" ... PM EST on the DIY Network.   ... Vegas , site of the 2015 International CES ...
(Date:3/17/2015)... SAN DIEGO , March 17, 2015 /PRNewswire/ ... and emotion analytics software, today announced general availability ... on-demand web service for the analysis of facial ... they experience advertising, media content, products and services. ... customer attention, engagement and sentiment - as derived ...
Breaking Biology News(10 mins):HOYOS Labs to Showcase Host of Biometrics Technologies at Connect:ID in Washington, D.C. 2HOYOS Labs to Showcase Host of Biometrics Technologies at Connect:ID in Washington, D.C. 3NXT-ID's Wocket Biometric Smart Wallet to Air on "I Want That" International CES Special 2NXT-ID's Wocket Biometric Smart Wallet to Air on "I Want That" International CES Special 3New Emotient Web Service Measures Audience Response Using On-Demand Facial Expression Analysis 2New Emotient Web Service Measures Audience Response Using On-Demand Facial Expression Analysis 3New Emotient Web Service Measures Audience Response Using On-Demand Facial Expression Analysis 4
... Scientists using revolutionary new technology developed at The University ... life so far. Using a scientific technique known ... have been able to date chemical fossils discovered in ... that these fossil steroids, remnants of a type of ...
... was uncovered in London in August 2006, the Department ... to to find ways to not only detect liquids ... out what those liquids are. Now, S&T-sponsored scientists at ... They have successfully tested a liquid explosive detection ...
... work in animals showed limited activity when statins were ... in the February issue of Cancer Prevention Research ... Research. Statins, sold under brand names like ... and prevent heart disease, and prominent cardiologists almost universally ...
Cached Biology News:Engineering technology pinpoints earliest signs of animal life 2Good liquid, bad liquid 2Statin therapy ineffective in breast cancer prevention 2
(Date:4/18/2015)... , April 18, 2015 ... CRIS ) will be presenting data at ... American Associate of Cancer Research Annual Meeting (April ...      (Logo: http://photos.prnewswire.com/prnh/20130418/608115 ) , ... proprietary Nicotinamide phosphoribosyltransferase (NAMPT) small molecule inhibitors program, ...
(Date:4/17/2015)... , April 17, 2015  Centrillion Technologies, ... SBIR grant from the National Human Genome ... of Health (NIH). The grant will help ... the development of breakthrough genomic technologies, including ... fabricated substrates. Centrillion has been developing this ...
(Date:4/17/2015)... Reed Technology and Information Services ... management, preparation, and submission to the U.S. Food and ... new Lot Distribution Report (LDR) service for manufacturers of ... with the FDA’s new rule on electronic submission of ... the volume and timing of particular biologics introduced to ...
(Date:4/17/2015)... (PRWEB) April 17, 2015 CIO Review ... for its 20 Most Promising Pharma and Life Science ... MMIS’s MediSpend global compliance software platform for life sciences ... selected by a panel of experts and members of ... entrepreneurship. “MMIS’s MediSpend Platform has been on our radar ...
Breaking Biology Technology:Aurigene to Present its NAMPT and IRAK-4 Inhibitors Programs at AACR 2015 2Reed Tech Announces FDA Lot Distribution Report (LDR) Service for Manufacturers of Biologic Products 2Reed Tech Announces FDA Lot Distribution Report (LDR) Service for Manufacturers of Biologic Products 3MMIS Chosen by CIO Review as Top 20 Most Promising Pharma and Life Science Technology Solution Providers 2015 2
... A team of nanotechnology researchers from the University ... force microscopy to determine the nanoscale frictional characteristics ... for these very different materials. Friction across ... atomic layers decreases, all the way down to ...
... (NIST) have built and tested a device for trapping electrically ... at once with the most versatile control of any trap ... to systematically scale up from traps that hold a few ... can process many ions simultaneously, with the ultimate goal of ...
... ... to devise an energy independence plan that goes beyond OCS drilling and that includes ... , ... (PRWEB) April 1, 2010 -- Responding to President Obama,s Decision to Open the East ...
Cached Biology Technology:Nanotechnologists reveal the frictional characteristics of atomically thin sheets 2NIST racetrack ion trap is a contender in quantum computing quest 2Responding to OCS Drilling Decision, Advocacy Group Challenges President to "Get Serious" About Energy Independence and Security 2
Rad 51C Immunogen: His-tagged human Rad 51C, over-expressed in E. coli Storage: 4 C...
... Synthetic peptide derived from the C-terminal region ... factor D iris-expressed growth factor spinal cord-derived ... and rat by one amino acid replacement. ... human mouse and rat PDGF-D proteins. ...
...
...
Biology Products: